CN105099289A - Brushless direct current motor and driving control circuit thereof - Google Patents
Brushless direct current motor and driving control circuit thereof Download PDFInfo
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Abstract
The invention discloses a driving control circuit of a brushless direct current motor and a brushless direct current motor provided with the same. The driving control circuit comprises a battery, a three-phase inverter bridge, a three-phase driving circuit, a control unit and a voltage converter, wherein the battery is used for supplying power to the driving control circuit, a three-phase output end of the three-phase inverter bridge is connected with the brushless direct current motor, the three-phase driving circuit is used for outputting a driving signal to the three-phase inverter bridge so as to drive the three-phase inverter bridge, the control unit is connected with the three-phase driving circuit so as to control the three-phase driving circuit to output the driving signal, an input end of the voltage converter is connected with the battery, a first output end of the voltage converter is connected with the control unit, a second output end of the voltage converter is connected with the three-phase driving circuit, and direct current output from the voltage converter is converted into direct current at a preset voltage to be supplied to the control unit and the three-phase driving circuit. When the battery voltage is lower than the voltage required for the control unit or the three-phase driving circuit, the circuit still can stably work, and the utilization rate of the battery is improved.
Description
Technical field
The present invention relates to technical field of motors, particularly a kind of Drive and Control Circuit of brshless DC motor and a kind of brshless DC motor with this Drive and Control Circuit.
Background technology
Usually, making in battery-powered electric tool, by battery directly to the controller in electric tool and drive circuitry, carrying out drive motors and carrying out work, and the voltage that battery exports when the state be full of completely is higher, and along with battery electricity reduce export voltage also decrease.
Further, when the output voltage of battery is lower, whole motor-drive circuit can be caused to generate heat serious, the normal work of motor cannot be ensured, therefore, when the output voltage of battery becomes lower than reference voltage, need the operation stopping electric tool, battery is charged.If higher with reference to voltage sets, then the utilance of battery can be caused inadequate.
A kind of brushless motor driving circuit adopting transducer is proposed in correlation technique, although still can ensure that when cell voltage reduces motor normally works, but when the operating voltage of cell voltage lower than control unit, control unit will quit work, thus cannot ensure that motor continues normal work.In addition, the operating voltage General Requirements of control unit is limited in certain scope, and cell voltage in use exists a very wide value range, thus need to ensure that the voltage stabilization of battery supply control unit is in certain scope, and this is not considered in correlation technique.
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, one object of the present invention is the Drive and Control Circuit proposing a kind of brshless DC motor, still can stably work lower than when control unit or three-phase drive circuit required voltage at cell voltage, make the voltage stabilization supplying control unit simultaneously in certain scope, meet the requirement of control unit.
Another object of the present invention is to propose a kind of brshless DC motor.
For achieving the above object, one aspect of the present invention embodiment proposes a kind of Drive and Control Circuit of brshless DC motor, comprising: battery, and described battery is used for powering to described Drive and Control Circuit; Three phase inverter bridge, the three-phase output end of described three phase inverter bridge is connected with brshless DC motor; Three-phase drive circuit, described three-phase drive circuit is used for output drive signal to described three phase inverter bridge to drive described three phase inverter bridge; Control unit, described control unit is connected to control described three-phase drive circuit and exports described drive singal with described three-phase drive circuit; Electric pressure converter, the input of described electric pressure converter is connected with described battery, first output of described electric pressure converter is connected with described control unit, second output of described electric pressure converter is connected with described three-phase drive circuit, and described electric pressure converter is used for the direct current that described battery exports to be converted to the direct current of predeterminated voltage to supply described control unit and described three-phase drive circuit.
The Drive and Control Circuit of the brshless DC motor of the embodiment of the present invention, change to supply control unit and three-phase drive circuit to the direct current that battery exports by electric pressure converter simultaneously, thus ensure at cell voltage lower than still can steady operation when control unit or three-phase drive circuit required voltage, simultaneously, the direct current that electric pressure converter exports can be stabilized in certain scope, meet the requirement of control unit required voltage, thus can ensure control unit steady operation in battery uses.
According to one embodiment of present invention, when the galvanic voltage that described battery exports is less than described predeterminated voltage, described electric pressure converter is operated in boost mode and carries out boost conversion with the direct current exported described battery; When the galvanic voltage that described battery exports is greater than described predeterminated voltage, described electric pressure converter is operated in decompression mode and carries out step-down conversion with the direct current exported described battery.
According to one embodiment of present invention, described three-phase drive circuit comprises three-phase upper arm driver element, three-phase underarm driver element, the floating voltage maker corresponding with phase upper arm driver element every in described three-phase upper arm driver element, wherein, the output of described electric pressure converter is connected to described every phase upper arm driver element by described floating voltage maker, and the output of described electric pressure converter also in direct and described three-phase underarm driver element every phase underarm driver element be connected.
Particularly, described floating voltage maker comprises bootstrap diode and the bootstrap capacitor of series connection.
According to one embodiment of present invention, described electric pressure converter comprises the first voltage conversion unit and the second voltage conversion unit, described first voltage conversion unit is identical with the circuit structure of described second voltage conversion unit, each voltage conversion unit specifically comprises: the first switching tube, and the first end of described first switching tube is as the input of described electric pressure converter, second switch pipe, the first end of described second switch pipe is connected with the second end of described first switching tube, the second end ground connection of described second switch pipe, first inductance, one end of described first inductance is connected with the first end of described second switch pipe with the second end of described first switching tube respectively, 3rd switching tube, the first end of described 3rd switching tube is connected with the other end of described first inductance, ground connection after the second end of described 3rd switching tube is connected with the second end of described second switch pipe, 4th switching tube, the first end of described 4th switching tube is connected with the other end of described first inductance, and the second end of described 4th switching tube is as the output of described electric pressure converter, first electric capacity, one end of described first electric capacity is connected with the second end of described 4th switching tube, ground connection after the other end of described first electric capacity is connected with the second end of described 3rd switching tube, control IC, described control IC respectively with the input of described electric pressure converter, the output of described electric pressure converter and the control end of described first switching tube, the control end of described second switch pipe, the control end of described 3rd switching tube is connected with the control end of described 4th switching tube, the output voltage of the galvanic voltage that described control IC exports according to described battery and described electric pressure converter is to described first switching tube, described second switch pipe, described 3rd switching tube and described 4th switching tube carry out controlling to make described electric pressure converter be operated in boost mode or decompression mode.
Particularly, when described control IC control described first switching tube be in normally off and described second switch pipe is in normally open time, by controlling described 3rd switching tube and described 4th switching tube is operated in boost mode to make described voltage conversion unit.
Particularly, when described control IC control described 4th switching tube be in normally off and described 3rd switching tube is in normally open time, by controlling described first switching tube and described second switch pipe is operated in decompression mode to make described voltage conversion unit.
For achieving the above object, the present invention on the other hand embodiment proposes a kind of brshless DC motor, and it comprises the Drive and Control Circuit of above-mentioned brshless DC motor.
The brshless DC motor of the embodiment of the present invention is by the Drive and Control Circuit of above-mentioned brshless DC motor, can the still Absorbable organic halogens work when cell voltage is very high or very low, specifically, electric pressure converter in Drive and Control Circuit is changed to supply control unit and three-phase drive circuit to the direct current that battery exports simultaneously, thus ensure at cell voltage lower than still Absorbable organic halogens work when control unit or three-phase drive circuit required voltage, simultaneously, the direct current that electric pressure converter exports can be stabilized in certain scope, meet the requirement of control unit required voltage, thus control unit steady operation can be ensured in battery uses, thus make brshless DC motor steady operation in one of battery very wide voltage range.
Summary of the invention
The application makes the understanding of following problem and research based on inventor:
Accompanying drawing explanation
Fig. 1 is the structural representation of the Drive and Control Circuit of brshless DC motor according to an embodiment of the invention.
Fig. 2 is the structural representation of the Drive and Control Circuit of brshless DC motor in accordance with another embodiment of the present invention.
Fig. 3 is the circuit diagram of voltage conversion unit according to an embodiment of the invention.
Reference numeral: battery 10, three phase inverter bridge 20, three-phase drive circuit 30, three-phase upper arm driver element 31, three-phase underarm driver element 32, floating voltage maker 33, control unit 40, electric pressure converter 50, first voltage conversion unit 51, second voltage conversion unit 52, first switching tube Q1, second switch pipe Q2, the first inductance L 1, the 3rd switching tube Q3, the 4th switching tube Q4, the first electric capacity C1, control IC and brshless DC motor M.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Describe the Drive and Control Circuit of the brshless DC motor proposed according to the embodiment of the present invention with reference to the accompanying drawings and there is the brshless DC motor of this Drive and Control Circuit.
Fig. 1 is the structural representation of the Drive and Control Circuit of brshless DC motor according to an embodiment of the invention.As shown in Figure 1, the Drive and Control Circuit of this brshless DC motor comprises: battery 10, three phase inverter bridge 20, three-phase drive circuit 30, control unit 40 and electric pressure converter 50.
Wherein, battery 10 is for powering to Drive and Control Circuit, the three-phase output end of three phase inverter bridge 20 is connected with brshless DC motor M, three-phase drive circuit 30 for output drive signal to three phase inverter bridge 20 to drive three phase inverter bridge 20, control unit 40 is connected to control three-phase drive circuit 30 output drive signal with three-phase drive circuit 30, the input of electric pressure converter 50 is connected with battery 10, first output of electric pressure converter 50 is connected with control unit 40, second output of electric pressure converter 50 is connected with three-phase drive circuit 30, electric pressure converter 50 is converted to the direct current of predeterminated voltage to supply control unit 40 and three-phase drive circuit 30 for the direct current exported by battery 10.
Specifically, if the direct current that battery 10 exports is powered directly to control unit 40, then when minimum lower than control unit 40 of the voltage of battery 10, control unit 40 will quit work, thus cannot ensure that brshless DC motor M normally works, therefore, the minimum voltage that battery 10 can use will be subject to the restriction of the double factor of three-phase drive circuit 30 and control unit 40.And when the composition of control unit 40 is different, the minimum voltage that battery 10 can use also is different, thus reduces the utilance of battery 10.
In addition, battery 10 in use, the galvanic change in voltage amplitude exported due to battery 10 is large, namely the voltage range that existence one is very wide, and the operating voltage of control unit 40 must be stabilized in certain voltage range, this is with regard to requiring that the direct current to battery 10 exports carries out corresponding conversion process, to ensure that control unit 40 is operated in stable voltage range, thus ensures that control unit 40 can reliably working.
Therefore, in an embodiment of the present invention, the direct current exported by electric pressure converter 50 pairs of batteries 10 is changed, to export the direct current supply control unit 40 of predeterminated voltage, wherein predeterminated voltage is the operating voltage of control unit 40, thus ensure that control unit 40 can be operated in stable voltage range, and still can work on when the voltage compare of battery 10 is low, effectively improve the utilance of battery 10.Simultaneously, the direct current supply three-phase drive circuit 30 of the predeterminated voltage that electric pressure converter 50 exports, still can work on when the voltage compare of battery 10 is low, thus brshless DC motor M can be worked on, wherein predeterminated voltage is the voltage that three-phase drive circuit 30 can normally work.
According to one embodiment of present invention, when the galvanic voltage that battery 10 exports is less than predeterminated voltage, electric pressure converter 50 is operated in boost mode and carries out boost conversion with the direct current exported battery 10; When the galvanic voltage that battery 10 exports is greater than predeterminated voltage, electric pressure converter 50 is operated in decompression mode and carries out step-down conversion with the direct current exported battery 10.
Specifically, when the galvanic voltage that battery 10 exports is less than the operating voltage of control unit 40, the galvanic voltage that electric pressure converter 50 exports to raise battery 10 as booster circuit, thus ensure that control unit 40 can work on; When the galvanic voltage that battery 10 exports is greater than the operating voltage of control unit 40, the galvanic voltage that electric pressure converter 50 exports to reduce battery 10 as reduction voltage circuit, thus ensure that control unit 40 can work on.
When the galvanic voltage that battery 10 exports is less than the voltage that three-phase drive circuit 30 can normally work, the galvanic voltage that electric pressure converter 50 exports to raise battery 10 as booster circuit, thus ensure that three-phase drive circuit 30 can work on; When the galvanic voltage that battery 10 exports is greater than the voltage that three-phase drive circuit 30 can normally work, the galvanic voltage that electric pressure converter 50 exports to reduce battery 10 as reduction voltage circuit, thus guarantee three-phase drive circuit 30 can work on.
According to one embodiment of present invention, three-phase drive circuit 30 comprises three-phase upper arm driver element 31, three-phase underarm driver element 32, the floating voltage maker 33 corresponding with phase upper arm driver element every in three-phase upper arm driver element 31, wherein, the output of electric pressure converter 50 is connected to every phase upper arm driver element by floating voltage maker 33, and the output of electric pressure converter 50 also direct and phase underarm driver element every in three-phase underarm driver element 32 be connected.Floating voltage maker 33 comprises bootstrap diode (not specifically illustrating in figure) and the bootstrap capacitor (not specifically illustrating in figure) of series connection.
It should be noted that, floating voltage maker 33 is mainly used in boosting, to make three-phase upper arm driver element 31 normally work, thus drives the upper brachium pontis work of three phase inverter bridge 20.Specifically, in the Drive and Control Circuit course of work, bootstrap capacitor stored charge, bootstrap diode prevents electric current from pouring in down a chimney, when frequency ratio is higher, the voltage of floating voltage maker 33 is the galvanic voltage of electric pressure converter 50 output and the voltage sum of bootstrap capacitor, thus plays boosting, can control three-phase upper arm driver element 31 normally work to make control unit 40.
According to one embodiment of present invention, as shown in Figure 2, electric pressure converter 50 comprises the first voltage conversion unit 51 and the second voltage conversion unit 52, wherein, first voltage conversion unit 51 is connected with control unit 40 as the first output of electric pressure converter 50, and the second voltage conversion unit 52 is connected with three-phase drive circuit 30 as the second output of electric pressure converter 50.First voltage conversion unit 51 is identical with the circuit structure of the second voltage conversion unit 52, as shown in Figure 3, each voltage conversion unit specifically comprises: the first switching tube Q1, second switch pipe Q2, the first inductance L 1, the 3rd switching tube Q3, the 4th switching tube Q4, the first electric capacity C1 and control IC.Wherein, the first end of the first switching tube Q1 is as the input of electric pressure converter 50, the first end of second switch pipe Q2 is connected with second end of the first switching tube Q1, the second end ground connection GND of second switch pipe Q2, one end of first inductance L 1 is connected with the first end of second switch pipe Q2 with second end of the first switching tube Q1 respectively, the first end of the 3rd switching tube Q3 is connected with the other end of the first inductance L 1, ground connection GND after second end of the 3rd switching tube Q3 is connected with second end of second switch pipe Q2, the first end of the 4th switching tube Q4 is connected with the other end of the first inductance L 1, second end of the 4th switching tube Q4 is as the output of electric pressure converter 50, one end of first electric capacity C1 is connected with second end of the 4th switching tube Q4, ground connection GND after the other end of the first electric capacity C1 is connected with second end of the 3rd switching tube Q3, control IC respectively with the input of electric pressure converter 50, the output of electric pressure converter 50 and the control end of the first switching tube Q1, the control end of second switch pipe Q2, the control end of the 3rd switching tube Q3 is connected with the control end of the 4th switching tube Q4, the output voltage of the galvanic voltage that control IC exports according to battery 10 and electric pressure converter 50 is to the first switching tube Q1, second switch pipe Q2, 3rd switching tube Q3 and the 4th switching tube Q4 carries out controlling to make electric pressure converter 50 be operated in boost mode or decompression mode.
Wherein, when control IC control the first switching tube Q1 be in normally off and second switch pipe Q2 is in normally open time, by controlling the 3rd switching tube Q3 and the 4th switching tube Q4 is operated in boost mode to make voltage conversion unit; When control IC control the 4th switching tube Q4 be in normally off and the 3rd switching tube Q3 is in normally open time, by controlling the first switching tube Q1 and second switch pipe Q2 is operated in decompression mode to make voltage conversion unit.
Specifically, further illustrate for the first voltage conversion unit 51.
As shown in Figure 3, Vin is the input voltage of the first voltage conversion unit 51 and the input voltage of electric pressure converter 50, Vout is the voltage of the output voltage of the first voltage conversion unit 51 and the first output of electric pressure converter 50, control IC is by the turn-on and turn-off of control first switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3 and the 4th switching tube Q4, to complete the discharge and recharge in LC loop, thus the output voltage Vout of the first voltage conversion unit 51 is made to meet the voltage request of control unit 40.
Wherein, when input voltage vin is greater than the output voltage Vout of the first voltage conversion unit 51, namely when the voltage that battery 10 exports is greater than control unit 40 required voltage, control IC controls the 4th switching tube Q4 and is in normally off, and control the 3rd switching tube Q3 and be in normally open, to make the first voltage conversion unit 51 be operated in decompression mode, now by the turn-on and turn-off of control first switching tube Q1 and second switch pipe Q2 with the voltage request making the output voltage Vout of the first voltage conversion unit 51 meet control unit 40; When input voltage vin is less than the output voltage Vout of the first voltage conversion unit 51, namely when the voltage that battery 10 exports is less than control unit 40 required voltage, control IC controls the first switching tube Q1 and is in normally off, and control second switch pipe Q2 and be in normally open, boost mode is operated in make the first voltage conversion unit 51, now by the turn-on and turn-off of control the 3rd switching tube Q3 and the 4th switching tube Q4, with the voltage request making the output voltage Vout of the first voltage conversion unit 51 meet control unit 40.
Because the first voltage conversion unit is identical with the circuit structure of the second voltage conversion unit, therefore, no longer the course of work of the second voltage conversion unit is described here.In addition, because electric pressure converter 50 has voltage stabilizing function, thus can ensure that exporting galvanic voltage can be stabilized in certain working range, meets the requirement of control unit 40 and three-phase drive circuit 30.
It should be noted that, the first switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3 and the 4th switching tube Q4 can be metal-oxide-semiconductor, IGBT or triode etc.
The Drive and Control Circuit of the brshless DC motor of the embodiment of the present invention, change to supply control unit and three-phase drive circuit to the direct current that battery exports by electric pressure converter simultaneously, thus ensure at cell voltage lower than still can steady operation when control unit or three-phase drive circuit required voltage, simultaneously, the direct current that electric pressure converter exports can be stabilized in certain scope, meet the requirement of control unit required voltage, thus can ensure control unit steady operation in battery uses.
In addition, embodiments of the invention also proposed a kind of brshless DC motor, and it comprises the Drive and Control Circuit of above-mentioned brshless DC motor.
The brshless DC motor of the embodiment of the present invention is by the Drive and Control Circuit of above-mentioned brshless DC motor, can the still Absorbable organic halogens work when cell voltage is very high or very low, specifically, electric pressure converter in Drive and Control Circuit is changed to supply control unit and three-phase drive circuit to the direct current that battery exports simultaneously, thus ensure at cell voltage lower than still Absorbable organic halogens work when control unit or three-phase drive circuit required voltage, simultaneously, the direct current that electric pressure converter exports can be stabilized in certain scope, meet the requirement of control unit required voltage, thus control unit steady operation can be ensured in battery uses, thus make brshless DC motor steady operation in one of battery very wide voltage range.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (8)
1. a Drive and Control Circuit for brshless DC motor, is characterized in that, comprising:
Battery, described battery is used for powering to described Drive and Control Circuit;
Three phase inverter bridge, the three-phase output end of described three phase inverter bridge is connected with brshless DC motor;
Three-phase drive circuit, described three-phase drive circuit is used for output drive signal to described three phase inverter bridge to drive described three phase inverter bridge;
Control unit, described control unit is connected to control described three-phase drive circuit and exports described drive singal with described three-phase drive circuit;
Electric pressure converter, the input of described electric pressure converter is connected with described battery, first output of described electric pressure converter is connected with described control unit, second output of described electric pressure converter is connected with described three-phase drive circuit, and described electric pressure converter is used for the direct current that described battery exports to be converted to the direct current of predeterminated voltage to supply described control unit and described three-phase drive circuit.
2. the Drive and Control Circuit of brshless DC motor according to claim 1, is characterized in that, wherein,
When the galvanic voltage that described battery exports is less than described predeterminated voltage, described electric pressure converter is operated in boost mode and carries out boost conversion with the direct current exported described battery;
When the galvanic voltage that described battery exports is greater than described predeterminated voltage, described electric pressure converter is operated in decompression mode and carries out step-down conversion with the direct current exported described battery.
3. the Drive and Control Circuit of brshless DC motor according to claim 1 and 2, it is characterized in that, described three-phase drive circuit comprises three-phase upper arm driver element, three-phase underarm driver element, the floating voltage maker corresponding with phase upper arm driver element every in described three-phase upper arm driver element, wherein, the output of described electric pressure converter is connected to described every phase upper arm driver element by described floating voltage maker, and the output of described electric pressure converter also in direct and described three-phase underarm driver element every phase underarm driver element be connected.
4. the Drive and Control Circuit of brshless DC motor according to claim 3, is characterized in that, described floating voltage maker comprises bootstrap diode and the bootstrap capacitor of series connection.
5. the Drive and Control Circuit of brshless DC motor according to claim 1 and 2, it is characterized in that, described electric pressure converter comprises the first voltage conversion unit and the second voltage conversion unit, described first voltage conversion unit is identical with the circuit structure of described second voltage conversion unit, and each voltage conversion unit specifically comprises:
First switching tube, the first end of described first switching tube is as the input of described electric pressure converter;
Second switch pipe, the first end of described second switch pipe is connected with the second end of described first switching tube, the second end ground connection of described second switch pipe;
First inductance, one end of described first inductance is connected with the first end of described second switch pipe with the second end of described first switching tube respectively;
3rd switching tube, the first end of described 3rd switching tube is connected with the other end of described first inductance, ground connection after the second end of described 3rd switching tube is connected with the second end of described second switch pipe;
4th switching tube, the first end of described 4th switching tube is connected with the other end of described first inductance, and the second end of described 4th switching tube is as the output of described electric pressure converter;
First electric capacity, one end of described first electric capacity is connected with the second end of described 4th switching tube, ground connection after the other end of described first electric capacity is connected with the second end of described 3rd switching tube;
Control IC, described control IC respectively with the input of described electric pressure converter, the output of described electric pressure converter and the control end of described first switching tube, the control end of described second switch pipe, the control end of described 3rd switching tube is connected with the control end of described 4th switching tube, the output voltage of the galvanic voltage that described control IC exports according to described battery and described electric pressure converter is to described first switching tube, described second switch pipe, described 3rd switching tube and described 4th switching tube carry out controlling to make described electric pressure converter be operated in boost mode or decompression mode.
6. the Drive and Control Circuit of brshless DC motor according to claim 5, it is characterized in that, when described control IC control described first switching tube be in normally off and described second switch pipe is in normally open time, by controlling described 3rd switching tube and described 4th switching tube is operated in boost mode to make described voltage conversion unit.
7. the Drive and Control Circuit of brshless DC motor according to claim 5, it is characterized in that, when described control IC control described 4th switching tube be in normally off and described 3rd switching tube is in normally open time, by controlling described first switching tube and described second switch pipe is operated in decompression mode to make described voltage conversion unit.
8. a brshless DC motor, is characterized in that, comprises the Drive and Control Circuit of the brshless DC motor according to any one of claim 1-7.
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| CN115027274A (en) * | 2022-07-11 | 2022-09-09 | 珠海格力电器股份有限公司 | Power supply driving circuit |
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| 张占松等: "《开关电源技术教程》", 31 October 2012, 机械工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115027274A (en) * | 2022-07-11 | 2022-09-09 | 珠海格力电器股份有限公司 | Power supply driving circuit |
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Application publication date: 20151125 |