CN112532116A - Control circuit of motor electromagnetic brake - Google Patents
Control circuit of motor electromagnetic brake Download PDFInfo
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- CN112532116A CN112532116A CN202011432800.2A CN202011432800A CN112532116A CN 112532116 A CN112532116 A CN 112532116A CN 202011432800 A CN202011432800 A CN 202011432800A CN 112532116 A CN112532116 A CN 112532116A
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- 230000005669 field effect Effects 0.000 claims abstract description 125
- 238000004804 winding Methods 0.000 claims abstract description 26
- 239000003990 capacitor Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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Classifications
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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
- H02P3/18—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 an ac motor
- H02P3/22—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 an ac motor by short-circuit or resistive braking
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
The invention discloses a control circuit of an electromagnetic brake of a motor, which comprises a motor body, a resistance loss circuit, a three-phase winding circuit, a power supply, an electric control system and a switch, wherein the resistance loss circuit is connected with the three-phase winding circuit; the resistance loss circuit comprises a seventh field effect transistor and a resistor, one end of the resistor is connected with one end of the switch, the other end of the resistor is connected with the drain electrode of the seventh field effect transistor, and the source electrode of the seventh field effect transistor is connected with the negative electrode of the power supply. The invention confirms the energy of the motor by the motor speed fed back to the electric control system, then controls the working time of the resistance loss circuit and the three-phase winding circuit by the electric control system, and the two circuits can alternately run, thereby reducing the size of the loss resistance, protecting the winding of the motor from being burnt out, using the inching function when the braking duration exceeds the preset time, ensuring the braking safety, needing no additional braking system, being more convenient and faster and saving the cost.
Description
Technical Field
The invention relates to the field of control of motor equipment, in particular to a control circuit of a motor electromagnetic brake.
Background
In the process of motor deceleration, the motor is in a power generation state, and redundant electricity is consumed or energy recovery is carried out. The current common method is to consume energy. At present, the energy consumption mode is processed by an external mechanical brake, or redundant energy is consumed by a resistor, and energy is consumed by short-circuiting a three-phase winding of the motor. Need dispose extra braking system through the outside brake, direct through the resistance energy consumption, then need calculate its required resistance size of work according to the maximum energy, if adopt the short circuit of three-phase winding to consume, then at high speed, its short circuit current can be very big, the duration overlength can burn out the motor, like the electric wheelchair electromagnetic brake control circuit that CN209692655U disclosed, open the mode that the brake low pressure maintains the brake through the high pressure and reduce the brake power consumption, this kind of design is suitable for on the motor braking system that the rotational speed is not high, when the motor rotational speed is very high, the effect of brake will greatly reduced, consequently, need design a new braking system to solve above-mentioned problem.
Disclosure of Invention
The present invention is directed to a control circuit for an electromagnetic brake of a motor, so as to solve the problems in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: a control circuit of a motor electromagnetic brake comprises a motor body, a resistance loss circuit, a three-phase winding circuit, a power supply, an electric control system and a switch;
a switch is arranged at the positive end of the power supply;
the resistance loss circuit comprises a seventh field effect transistor and a resistor, one end of the resistor is connected with one end of the switch, the other end of the resistor is connected with the drain electrode of the seventh field effect transistor, and the source electrode of the seventh field effect transistor is connected with the negative electrode of the power supply;
the three-phase winding circuit comprises a first field effect transistor, a second field effect transistor, a third field effect transistor, a fourth field effect transistor, a fifth field effect transistor and a sixth field effect transistor, wherein the drain electrode of the first field effect transistor is connected with one end of the switch, the source electrode of the first field effect transistor is connected with the drain electrode of the second field effect transistor, and the source electrode of the second field effect transistor is connected with the negative electrode of the power supply; the drain electrode of the third field effect transistor is connected with one end of the switch, the source electrode of the third field effect transistor is connected with the drain electrode of the fourth field effect transistor, and the source electrode of the fourth field effect transistor is connected with the negative electrode of the power supply; the drain electrode of the fifth field effect transistor is connected with one end of the switch, the source electrode of the fifth field effect transistor is connected with the drain electrode of the sixth field effect transistor, and the source electrode of the sixth field effect transistor is connected with the negative electrode of the power supply;
the motor body comprises a three-phase winding, a lead is arranged between a source electrode of the first field effect transistor and a drain electrode of the second field effect transistor and connected to a first phase of the three-phase winding, a lead is arranged between a source electrode of the third field effect transistor and a drain electrode of the fourth field effect transistor and connected to a second phase of the three-phase winding, and a lead is arranged between a source electrode of the fifth field effect transistor and a drain electrode of the sixth field effect transistor and connected to a third phase of the three-phase winding.
Preferably, the electric control system is electrically connected with the grid electrode of the second field effect transistor, the grid electrode of the fourth field effect transistor, the grid electrode of the sixth field effect transistor and the grid electrode of the seventh field effect transistor.
Preferably, a capacitor is arranged in the control circuit, one end of the capacitor is connected with the positive pole of the power supply, and the other end of the capacitor is connected with the negative pole of the power supply.
Preferably, the switch is a relay.
Preferably, the negative pole of the power supply is grounded.
Preferably, the motor body can feed back the speed of the motor to the electronic control system.
Preferably, the power supply provides direct current.
Compared with the prior art, the invention has the beneficial effects that: the invention confirms the energy of the motor by the motor speed fed back to the electric control system, then controls the working time of the resistance loss circuit and the three-phase winding circuit by the electric control system, and the two circuits can alternately run, thereby reducing the size of the loss resistance, protecting the winding of the motor from being burnt out, using the inching function when the braking duration exceeds the preset time, ensuring the braking safety, needing no additional braking system, being more convenient and faster and saving the cost.
Drawings
Fig. 1 is a schematic diagram of the circuit structure of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, a control circuit for an electromagnetic brake of a motor includes a motor body, a resistive loss circuit, a three-phase winding circuit, a power supply DC, and an electric control system switch S;
a switch S is arranged at the positive end of the power supply DC;
the resistance loss circuit comprises a seventh field effect transistor Q7 and a resistor R1, wherein one end of the resistor R1 is connected with one end of a switch S, the other end of the resistor R1 is connected with the drain electrode of the seventh field effect transistor Q7, and the source electrode of the seventh field effect transistor Q7 is connected with the negative electrode of the power supply DC;
the three-phase winding circuit comprises a first field effect transistor Q1, a second field effect transistor Q2, a third field effect transistor Q3, a fourth field effect transistor Q4, a fifth field effect transistor Q5 and a sixth field effect transistor Q6, wherein the drain electrode of the first field effect transistor Q1 is connected with one end of a switch S, the source electrode of the first field effect transistor Q1 is connected with the drain electrode of the second field effect transistor Q2, and the source electrode of the second field effect transistor Q2 is connected with the negative electrode of a power supply DC; the drain electrode of the third field effect transistor Q3 is connected with one end of the switch S, the source electrode of the third field effect transistor Q3 is connected with the drain electrode of the fourth field effect transistor Q4, and the source electrode of the fourth field effect transistor Q4 is connected with the negative electrode of the power supply DC; the drain electrode of the fifth field effect transistor Q5 is connected with one end of the switch S, the source electrode of the fifth field effect transistor Q5 is connected with the drain electrode of the sixth field effect transistor Q6, and the source electrode of the sixth field effect transistor Q6 is connected with the negative electrode of the power supply DC;
the motor body comprises a three-phase winding T, a lead is arranged between the source electrode of the first field effect transistor Q1 and the drain electrode of the second field effect transistor Q2 and connected to a first phase of the three-phase winding T, a lead is arranged between the source electrode of the third field effect transistor Q3 and the drain electrode of the fourth field effect transistor Q4 and connected to a second phase of the three-phase winding T, and a lead is arranged between the source electrode of the fifth field effect transistor Q5 and the drain electrode of the sixth field effect transistor Q6 and connected to a third phase of the three-phase winding T.
And the electric control system is electrically connected with the grid electrode of the second field effect transistor Q2, the grid electrode of the fourth field effect transistor Q4, the grid electrode of the sixth field effect transistor Q6 and the grid electrode of the seventh field effect transistor Q7.
The control circuit is provided with a capacitor C1, one end of the capacitor C1 is connected with the positive pole of the power supply DC, and the other end of the capacitor C1 is connected with the negative pole of the power supply DC.
The switch S adopts a relay.
The negative pole of the power supply DC is grounded.
The motor body can feed the speed of the motor back to the electric control system; the electric control system mainly has the functions of controlling the on-off of the field effect transistors Q1-Q6 according to the speed of the motor so as to control the rotating speed of the motor, and the other part of the functions of controlling the braking function of the motor by controlling the states of the field effect transistors Q2, Q4, Q6 and the seventh field effect transistor Q7.
The power supply DC provides direct current.
The working principle of the invention is as follows: when the electric control system detects that the speed of the fed-back motor is higher than the set speed, the PWM width controlled by the motor is firstly reduced, if the PWM width is reduced to 0, the speed of the motor is still higher than the set speed, and then the switch S is switched off to disconnect the battery from the motor control system. When the detected motor speed is higher than the set speed, firstly, the electric control system sends a high-level driving signal to the seventh field effect transistor Q7 to turn on the seventh field effect transistor Q7, the current directly passes through the resistor R1 and the seventh field effect transistor Q7, the turn-on time of the seventh field effect transistor Q7 is determined according to the power of the current-limiting resistor, and if the speed of the motor is limited to a set value within the turn-on time of the seventh field effect transistor Q7, the seventh field effect transistor Q7 is turned off; if the turn-on limit time of the seventh field effect transistor Q7 is exceeded, the electric control system simultaneously sends high level driving signals to the second field effect transistor Q2, the fourth field effect transistor Q4 and the sixth field effect transistor Q6, the second field effect transistor Q2, the fourth field effect transistor Q4 and the sixth field effect transistor Q6 are turned on for a short time, the current directly passes through the field effect transistors, the time for turning on the second field effect transistor Q2, the fourth field effect transistor Q4 and the sixth field effect transistor Q6 is determined according to the overcurrent capacity of the motor, the speed of the motor is reduced in the process of alternately turning on the seventh field effect transistor Q7, the second field effect transistor Q2, the fourth field effect transistor Q4 and the sixth field effect transistor Q6, if the accumulated time for alternately turning on the seventh field effect transistor Q7, the second field effect transistor Q2, the fourth field effect transistor Q4 and the sixth field effect transistor Q6 exceeds the set total braking time, the electronic control system will work in the snub mode, that is, the seventh field effect transistor Q7 will work intermittently until the motor reaches the set speed.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (7)
1. A control circuit of a motor electromagnetic brake is characterized by comprising a motor body, a resistance loss circuit, a three-phase winding circuit, a power supply (DC), an electric control system and a switch (S);
a switch (S) is arranged at the positive end of the power supply (DC);
the resistance loss circuit comprises a seventh field effect transistor (Q7) and a resistor (R1), wherein one end of the resistor (R1) is connected with one end of the switch (S), the other end of the resistor (R1) is connected with the drain electrode of the seventh field effect transistor (Q7), and the source electrode of the seventh field effect transistor (Q7) is connected with the negative electrode of the power supply (DC);
the three-phase winding circuit comprises a first field effect transistor (Q1), a second field effect transistor (Q2), a third field effect transistor (Q3), a fourth field effect transistor (Q4), a fifth field effect transistor (Q5) and a sixth field effect transistor (Q6), wherein the drain electrode of the first field effect transistor (Q1) is connected with one end of a switch (S), the source electrode of the first field effect transistor (Q1) is connected with the drain electrode of the second field effect transistor (Q2), and the source electrode of the second field effect transistor (Q2) is connected with the negative electrode of a power supply (DC); the drain of the third field effect transistor (Q3) is connected with one end of the switch (S), the source of the third field effect transistor (Q3) is connected with the drain of the fourth field effect transistor (Q4), and the source of the fourth field effect transistor (Q4) is connected with the negative pole of the power supply (DC); the drain electrode of the fifth field effect transistor (Q5) is connected with one end of the switch (S), the source electrode of the fifth field effect transistor (Q5) is connected with the drain electrode of the sixth field effect transistor (Q6), and the source electrode of the sixth field effect transistor (Q6) is connected with the negative electrode of the power supply (DC);
the motor body comprises a three-phase winding (T), a wire is arranged between the source electrode of the first field effect transistor (Q1) and the drain electrode of the second field effect transistor (Q2) and connected to the W end of the three-phase winding (T), a wire is arranged between the source electrode of the third field effect transistor (Q3) and the drain electrode of the fourth field effect transistor (Q4) and connected to the V end of the three-phase winding (T), and a wire is arranged between the source electrode of the fifth field effect transistor (Q5) and the drain electrode of the sixth field effect transistor (Q6) and connected to the U end of the three-phase winding (T).
2. The control circuit of an electric motor electromagnetic brake as claimed in claim 1, characterized in that the electric control system is electrically connected with the gate of the second field effect transistor (Q2), the gate of the fourth field effect transistor (Q4), the gate of the sixth field effect transistor (Q6) and the gate of the seventh field effect transistor (Q7).
3. The control circuit of an electromagnetic brake of an electric motor according to claim 1, characterized in that a capacitor (C1) is provided in the control circuit, one end of the capacitor (C1) is connected to the positive pole of the power supply (DC), and the other end of the capacitor (C1) is connected to the negative pole of the power supply (DC).
4. Control circuit of an electromechanical electromagnetic brake, in accordance with claim 1, characterized in that said switch (S) is a relay.
5. Control circuit for an electromagnetic brake of an electric machine according to claim 1, characterized in that the negative pole of said power supply (DC) is connected to ground.
6. The control circuit of the motor electromagnetic brake as claimed in claim 1, wherein the motor body is capable of feeding back the speed of the motor to the electronic control system.
7. Control circuit for an electromagnetic brake of an electric machine, according to claim 1, characterized in that said power supply (DC) supplies direct current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011432800.2A CN112532116A (en) | 2020-12-09 | 2020-12-09 | Control circuit of motor electromagnetic brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011432800.2A CN112532116A (en) | 2020-12-09 | 2020-12-09 | Control circuit of motor electromagnetic brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112532116A true CN112532116A (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011432800.2A Pending CN112532116A (en) | 2020-12-09 | 2020-12-09 | Control circuit of motor electromagnetic brake |
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| CN (1) | CN112532116A (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0947055A (en) * | 1995-07-31 | 1997-02-14 | Fuji Electric Co Ltd | Electric system for electric automobile |
| CN1521938A (en) * | 2003-02-14 | 2004-08-18 | 三星电子株式会社 | Motor control apparatus and control method thereof |
| CN1551481A (en) * | 2003-05-16 | 2004-12-01 | ���ǵ�����ʽ���� | Power supply device for motor |
| CN101380902A (en) * | 2007-09-04 | 2009-03-11 | 阿尔斯通运输公司 | Device for secure dynamic braking with a bipolar resistive element with permanent magnet motor |
| CN101896320A (en) * | 2007-12-11 | 2010-11-24 | 库卡罗伯特有限公司 | Industrial robot having redundant emergency brake circuit |
| CN203261272U (en) * | 2013-05-15 | 2013-10-30 | 佛山市顺德区凌奇电器实业有限公司 | Control device of brushless direct-current motor |
| CN103442931A (en) * | 2011-03-18 | 2013-12-11 | Ntn株式会社 | Motor driving device |
| EP2672622A1 (en) * | 2012-06-08 | 2013-12-11 | OSMA-AUFZÜGE Albert Schenk GmbH & Co. KG | Frequency inverter with brake resistance and method for monitoring the functionality of a brake resistance during the operation of a frequency inverter |
| CN104285055A (en) * | 2012-05-04 | 2015-01-14 | 埃尔塞乐公司 | Thrust reverser control system |
| CN106740139A (en) * | 2016-12-21 | 2017-05-31 | 湘电重型装备有限公司 | A kind of Large Dump Truck electric braking control device |
| CN107112927A (en) * | 2014-12-29 | 2017-08-29 | 西门子公司 | Safe electric braking device for synchronous motor |
| CN107408902A (en) * | 2015-02-25 | 2017-11-28 | 本田技研工业株式会社 | Power system |
| CN109039221A (en) * | 2018-08-29 | 2018-12-18 | 阳光电源股份有限公司 | A kind of active short circuit current and electric machine controller |
| CN110768604A (en) * | 2019-11-27 | 2020-02-07 | 湘潭市宇通牵引电气有限公司 | Control system of variable-frequency speed-regulating electric locomotive |
-
2020
- 2020-12-09 CN CN202011432800.2A patent/CN112532116A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0947055A (en) * | 1995-07-31 | 1997-02-14 | Fuji Electric Co Ltd | Electric system for electric automobile |
| CN1521938A (en) * | 2003-02-14 | 2004-08-18 | 三星电子株式会社 | Motor control apparatus and control method thereof |
| CN1551481A (en) * | 2003-05-16 | 2004-12-01 | ���ǵ�����ʽ���� | Power supply device for motor |
| CN101380902A (en) * | 2007-09-04 | 2009-03-11 | 阿尔斯通运输公司 | Device for secure dynamic braking with a bipolar resistive element with permanent magnet motor |
| CN101896320A (en) * | 2007-12-11 | 2010-11-24 | 库卡罗伯特有限公司 | Industrial robot having redundant emergency brake circuit |
| CN103442931A (en) * | 2011-03-18 | 2013-12-11 | Ntn株式会社 | Motor driving device |
| CN104285055A (en) * | 2012-05-04 | 2015-01-14 | 埃尔塞乐公司 | Thrust reverser control system |
| EP2672622A1 (en) * | 2012-06-08 | 2013-12-11 | OSMA-AUFZÜGE Albert Schenk GmbH & Co. KG | Frequency inverter with brake resistance and method for monitoring the functionality of a brake resistance during the operation of a frequency inverter |
| CN203261272U (en) * | 2013-05-15 | 2013-10-30 | 佛山市顺德区凌奇电器实业有限公司 | Control device of brushless direct-current motor |
| CN107112927A (en) * | 2014-12-29 | 2017-08-29 | 西门子公司 | Safe electric braking device for synchronous motor |
| CN107408902A (en) * | 2015-02-25 | 2017-11-28 | 本田技研工业株式会社 | Power system |
| CN106740139A (en) * | 2016-12-21 | 2017-05-31 | 湘电重型装备有限公司 | A kind of Large Dump Truck electric braking control device |
| CN109039221A (en) * | 2018-08-29 | 2018-12-18 | 阳光电源股份有限公司 | A kind of active short circuit current and electric machine controller |
| CN110768604A (en) * | 2019-11-27 | 2020-02-07 | 湘潭市宇通牵引电气有限公司 | Control system of variable-frequency speed-regulating electric locomotive |
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