CN103746618A - Direct-current brushless electric machine control device - Google Patents
Direct-current brushless electric machine control device Download PDFInfo
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- CN103746618A CN103746618A CN201410013167.1A CN201410013167A CN103746618A CN 103746618 A CN103746618 A CN 103746618A CN 201410013167 A CN201410013167 A CN 201410013167A CN 103746618 A CN103746618 A CN 103746618A
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- brushless motor
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- frequency changer
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Abstract
The invention discloses a direct-current brushless electric machine control device, in particular to a control device which uses a driver to drive a plurality of direct-current brushless electric machines to be started, stopped and subjected to speed regulation and fault protection. The direct-current brushless electric machine control device comprises the driver, wherein the driver comprises a frequency conversion circuit and a processor, and the output end of the processor is connected with the input end of the frequency conversion circuit via a lead. The direct-current brushless electric machine control device has the characteristics that the processor is provided with more than two paths and less than or equal to six paths of pulse width modulation wave generation functions, the frequency conversion circuit is provided with more than two and less than or equal to six power switch devices, and the output end of the frequency conversion circuit is connected with at least two direct-current brushless electric machines. According to the direct-current brushless electric machine control device, the manufacture cost can be lowered, and the synchronism of two or more than two electric machines can be improved.
Description
Technical field
The present invention relates to a kind of motor control assembly.Specifically, be utilize that a driver drives that many DC brushless motors start, stop, the control device of speed governing and error protection.
Background technology
In recent years, countries in the world require more and more higher to the energy-saving and emission-reduction of industrial circle, and new Energy Efficiency Standard is constantly released and started and enforces.DC brushless motor as high efficiency electric representative, has started to apply.And the driving of DC brushless motor just seems particularly important.
In DC brushless motor application, be mostly to adopt driver to control DC brushless motor.Driver wherein comprises processor and frequency changer circuit.At present, adopt the occasion of multiple electric motors parallel running more.In the occasion that adopts multiple electric motors parallel connection, be all to drive respectively multiple electric motors with many drivers, between driver and motor, be man-to-man relation, for example adopt two drivers to drive respectively two motors.Also have and adopt driver to drive two motors.Because the former needs many (as two) drivers, many (as two) motors are driven respectively, need the installing space of many (as two) drivers, many cover (as two covers) power line and control lines, not only circuit structure is complicated, manufacturing cost is higher, and because the factors such as property difference, installation environment or circuit signal transmission problem of components and parts can be brought the synchronism variation of two motors.The latter adopts two motors of a driver control, in fact wherein driver is that its essence is still controlled respectively two DC brushless motors with two drivers by a processor and two special purpose driver that frequency changer circuit integrates.In a word, adopt above-mentioned two kinds of control methods, a motor needs a frequency changer circuit, and the frequency changer circuit needing is many, and manufacturing cost is high.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of control device for direct-current brushless motor.Adopt this control device for direct-current brushless motor, can reduce manufacturing cost, improve the synchronism of two or more multiple electric motors.
The problems referred to above that the present invention will solve are realized by following technical scheme:
Control device for direct-current brushless motor of the present invention comprises a driver, described driver contains a frequency changer circuit and a processor, the output of described processor is connected with the input of described frequency changer circuit by wire, be characterized in that described processor is to have the processor that wave energy is sent out in no more than six tunnel pulse-width modulations, described frequency changer circuit is comprised of the device for power switching 2 of no more than six, and the output of frequency changer circuit is connected with at least two DC brushless motors.
Wherein, described frequency changer circuit is three phase winding frequency changer circuits, and described DC brushless motor is three phase winding DC brushless motors.Wherein in three phase winding DC brushless motors, position sensor circuit is installed; Or in three phase winding DC brushless motors,, containing position sensor circuit, now the same of the output port of each motor of driver is provided with current sensor on mutually.
Further improvement of the present invention scheme is, described frequency changer circuit is single-phase winding frequency changer circuit, and described DC brushless motor is single-phase winding DC brushless motor.
In described single-phase winding DC brushless motor, all have hall position sensor, described hall position sensor is all connected with processor.
In single-phase winding DC brushless motor when the position sensor circuit each motor of driver same phase output terminal mouth on current sensor is installed.
Take such scheme, have the following advantages:
As can be seen from the above scheme, because described processor is to have the processor that wave energy is sent out in no more than six tunnel pulse-width modulations, output by described frequency changer circuit is connected with at least two DC brushless motors, can to two or more DC brushless motors, control simultaneously.Owing to two or more DC brushless motors are controlled by a driver simultaneously, compare with DC brushless motor of a driver control in background technology, the driver needing is few, and distribution is simple, installation is easy, conserve space, can greatly reduce and produce and installation cost.
Because described processor is to have the processor that wave energy is sent out in no more than six tunnel pulse-width modulations, therefore can use the general industry control processor of highly versatile, low price just can realize the control function to DC brushless motor.Because each motor in parallel connection is enjoyed identical current/voltage phase place, can guarantee the synchronism that each motor is in operation again.
Accompanying drawing explanation
Fig. 1 is control device for direct-current brushless motor principle schematic of the present invention;
Fig. 2 is the control device for direct-current brushless motor principle schematic that adopts three phase winding frequency changer circuits;
Fig. 3 is the control device for direct-current brushless motor principle schematic that adopts single-phase winding frequency changer circuit;
Fig. 4 is another the control device principle schematic of DC brushless motor that adopts single-phase winding frequency changer circuit.
Embodiment
As shown in Figure 1, control device for direct-current brushless motor of the present invention comprises a driver, and described driver contains a frequency changer circuit 1 and a processor MCU, and the output of described processor MCU is connected with the input of frequency changer circuit 1 by wire.Processor MCU is wherein to have the processor MCU that wave energy is sent out in six tunnel pulse-width modulations, and described frequency changer circuit 1 has six device for power switching (2), and the output of frequency changer circuit 1 is connected with Liang Tai (or many) DC brushless motor.Because processor MCU is to have the processor that wave energy is sent out in six tunnel pulse-width modulations, driven DC brushless motor quantity can be both two, three, four, can be also five, six, and concrete quantity depends on the needs.
As shown in Figure 1, described frequency changer circuit 1 is three phase winding frequency changer circuits, and described DC brushless motor M is three phase winding DC brushless motors.In described DC brushless motor M, position transducer HS is all installed, described position transducer is all connected with processor MCU by wire.Described position transducer HS can be Hall-effect position sensors, pulse coder etc.
See Fig. 2, for three phase winding DC brushless motors, also can adopt between the same phase output terminal of described frequency changer circuit 1 and each DC brushless motor M the detection that current sensor is realized rotor-position is all installed.
See Fig. 3, described frequency changer circuit 1 is single-phase winding frequency changer circuit, and described DC brushless motor M is simplex winding DC brushless motor.Wherein, in described single-phase winding DC brushless motor M, position transducer HS is all installed, described position transducer is all connected with processor MCU by wire.Described position transducer HS can be Hall-effect position sensors, pulse coder etc.
See Fig. 4, for single-phase winding DC brushless motor, also can adopt between the same phase output terminal of described frequency changer circuit 1 and each DC brushless motor M the detection that current sensor CT realizes motor rotor position is all installed.
According to Principle of Electric Engine, DC brushless motor M belongs to the category of permanent magnet synchronous motor, and its excitation is provided by the permanent magnet that is fixed on rotor surface, stator rotating magnetic field must with rotor field direction consistent, just can provide constant electromagnetic torque to make rotor.If rotor position information is incorrect, will there is deviation in the stator current magnetic field size and Orientation applying, cause DC brushless motor M to send out and shake or step-out, makes to start unsuccessfully.
For addressing this problem, in DC brushless motor M installation site transducer HS in the situation that, the present invention adopts rotor-position fine motion comparison method, when first starting a motor according to the starting method of separate unit motor, detect the position signalling of all motors, if the position signalling state consistency of all motors, continues to start operation according to set control algolithm, now many DC brushless motor M enter synchronous operation state.If the position signalling state of other motor is inconsistent, controller resets and restarts.
For single-phase simplex winding DC brushless motor, because rotor field and stator field only have in the same way and reverse two kinds of relative status, therefore, generally as long as through once to twice adjustment, just can make all motors enter synchronous operation.If the motor in parallel connection has one step-out or other fault occur, the rotor-position signal of its rotor-position signal feeding back and other motor produces deviation, and at this moment, driver can stop Voltage-output, sends alarm signal, and attempts restarting.For example, if start/report to the police repeatedly (five times), still can not recover normally, driver can enter self-lock protection state.
For three-phase direct-current brushless motor, while first starting a motor according to the starting method of separate unit motor, the commutation voltage producing due to driver drives First three-phase direct-current brushless motor has formed a rotary work voltage, other motor is forced to drive by the driving voltage that driver produced, and can enter rapidly the operating state of synchronizeing with First motor.Now detect the position signalling of all motors, if the position signalling state consistency of all motors continues to start operation according to set control algolithm.If the position signalling state of other motor is inconsistent, controller resets and restarts.For example, if start/report to the police repeatedly (five times), still can not recover normally, driver can enter self-lock protection state.
The in the situation that of there is no installation site transducer HS in DC brushless motor M, the present invention adopts forced synchronizing method actuating motor.Now, driver is according to predefined voltage and frequency curve, and directly open loop output rotational voltage also progressively improves output frequency and output voltage, and output frequency switches to the control of position-sensor-free speed closed loop after being promoted to a certain default switching frequency.When starting First motor, according to the same phase current signal that is arranged on current detector on output port and detects all motors.If the same phase current signal state consistency of all motors, continues to start operation according to set control algolithm, now many DC brushless motors enter synchronous operation state.If same phase phase current signal state and the First motor of other motor are inconsistent, other motor desynchronizing is described, controller resets and restarts.
In addition, the position-sensor-free HS speed closed loop of DC brushless motor M is controlled method, is had induction voltage detecting method and position-sensor-free Hs vector control method.Above-mentioned control technology is mature technology, here no longer narration.
Claims (7)
1. control device for direct-current brushless motor, comprise a driver, described driver contains a frequency changer circuit (1) and a processor (MCU), the output of described processor (MCU) is connected with the input of described frequency changer circuit (1) by wire, it is characterized in that described processor (MCU) is to have the processor (MCU) of sending out wave energy more than two-way and no more than six tunnel pulse-width modulations, described frequency changer circuit (1) has more than two and no more than six device for power switching (2), the output of frequency changer circuit (1) is connected with at least two DC brushless motors (M).
2. control device for direct-current brushless motor according to claim 1, is characterized in that described frequency changer circuit (1) is three phase winding frequency changer circuits, and described DC brushless motor (M) is three phase winding DC brushless motors.
3. control device for direct-current brushless motor according to claim 2, is characterized in that described DC brushless motor (M) interior installation site sensing circuit (HS), and described position sensing circuit (HS) is all connected with processor (MCU).
4. control device for direct-current brushless motor according to claim 2, is characterized in that described processor (MCU) and between the same phase output terminal mouth of DC brushless motor (M), current sensor (CT) is all installed described in each.
5. control device for direct-current brushless motor according to claim 1, is characterized in that described frequency changer circuit (1) is single-phase winding frequency changer circuit, and described DC brushless motor (M) is single-phase winding DC brushless motor.
6. control device for direct-current brushless motor according to claim 5, is characterized in that all there is position sensing circuit (HS) in described single-phase winding DC brushless motor, and described position sensing circuit (HS) is all connected with processor (MCU).
7. control device for direct-current brushless motor according to claim 5, is characterized in that, between the same phase output terminal mouth of described processor (MCU) and each single-phase winding DC brushless motor (M), current sensor (CT) is all installed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410013167.1A CN103746618A (en) | 2013-11-08 | 2014-01-13 | Direct-current brushless electric machine control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310550034 | 2013-11-08 | ||
| CN201310550034.3 | 2013-11-08 | ||
| CN201410013167.1A CN103746618A (en) | 2013-11-08 | 2014-01-13 | Direct-current brushless electric machine control device |
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| CN103746618A true CN103746618A (en) | 2014-04-23 |
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| CN201410013167.1A Pending CN103746618A (en) | 2013-11-08 | 2014-01-13 | Direct-current brushless electric machine control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113239A (en) * | 2014-06-20 | 2014-10-22 | 美的集团武汉制冷设备有限公司 | Detection method of direct-current motor system and direct-current motor system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005245058A (en) * | 2004-02-24 | 2005-09-08 | Fuji Electric Fa Components & Systems Co Ltd | Parallel drive method of dc brushless motor |
| JP2011072062A (en) * | 2009-09-24 | 2011-04-07 | Kamimura Kogyo:Kk | Method and device for detecting failure in two or more bldc three-phase dc motors using single inverter |
| CN203086393U (en) * | 2013-03-14 | 2013-07-24 | 广东美的电器股份有限公司 | Parallel driving circuit of double brushless direct current motors |
| CN203691302U (en) * | 2013-11-08 | 2014-07-02 | 江苏仁源电气有限公司 | DC brushless motor control device |
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2014
- 2014-01-13 CN CN201410013167.1A patent/CN103746618A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005245058A (en) * | 2004-02-24 | 2005-09-08 | Fuji Electric Fa Components & Systems Co Ltd | Parallel drive method of dc brushless motor |
| JP2011072062A (en) * | 2009-09-24 | 2011-04-07 | Kamimura Kogyo:Kk | Method and device for detecting failure in two or more bldc three-phase dc motors using single inverter |
| CN203086393U (en) * | 2013-03-14 | 2013-07-24 | 广东美的电器股份有限公司 | Parallel driving circuit of double brushless direct current motors |
| CN203691302U (en) * | 2013-11-08 | 2014-07-02 | 江苏仁源电气有限公司 | DC brushless motor control device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113239A (en) * | 2014-06-20 | 2014-10-22 | 美的集团武汉制冷设备有限公司 | Detection method of direct-current motor system and direct-current motor system |
| CN104113239B (en) * | 2014-06-20 | 2017-01-11 | 美的集团武汉制冷设备有限公司 | Detection method of direct-current motor system and direct-current motor system |
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Application publication date: 20140423 |