CN114744929A - Motor drive power adapter - Google Patents

Motor drive power adapter Download PDF

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Publication number
CN114744929A
CN114744929A CN202210647749.XA CN202210647749A CN114744929A CN 114744929 A CN114744929 A CN 114744929A CN 202210647749 A CN202210647749 A CN 202210647749A CN 114744929 A CN114744929 A CN 114744929A
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CN
China
Prior art keywords
transistor
circuit
voltage
resistor
mos transistor
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Granted
Application number
CN202210647749.XA
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Chinese (zh)
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CN114744929B (en
Inventor
赖良海
王宪强
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Shenzhen E-Tek Electronics Manufactory Ltd
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Shenzhen E-Tek Electronics Manufactory Ltd
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Priority to CN202210647749.XA priority Critical patent/CN114744929B/en
Publication of CN114744929A publication Critical patent/CN114744929A/en
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Publication of CN114744929B publication Critical patent/CN114744929B/en
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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
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/0811—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for dc motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/0833—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for electric motors with control arrangements
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/1213—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for DC-DC converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

The invention discloses a motor drive power adapter, which comprises a transformation circuit, a dual-voltage circuit, a motor drive circuit and a controller, wherein the transformation circuit is used for converting input power voltage into first direct current; the dual-voltage circuit is connected with the transformation circuit so as to convert the first direct current into a second direct current and a third direct current, wherein the voltage of the second direct current is greater than that of the third direct current; the motor driving circuit is respectively connected with the double-voltage circuit and the motor so as to generate a driving signal through the second direct current and the third direct current, and the controller performs voltage transformation control on the voltage transformation circuit and controls the motor driving circuit to output the driving signal so as to control the motor to rotate. The motor driving power adapter circuit is relatively simple and can meet the requirements of driving and controlling the direct current motor. The failure rate of the driving circuit is extremely low, and the production cost of enterprises is reduced.

Description

Motor drive power adapter
Technical Field
The invention relates to the technical field of power supplies, in particular to a motor drive power adapter.
Background
In industrial processing, a motor is generally required to drive a processed workpiece to rotate, and the processed workpiece is matched with a processing mechanism to process the processed workpiece. Dc motors are increasingly used in industrial processes. The rotation of the dc motor is usually controlled by a driving circuit to control the rotation speed and direction of the dc motor. In the prior art, a driving and controlling circuit of a motor is very complicated. The complex driving circuit results in high failure rate and increases the production cost of the enterprise.
Disclosure of Invention
The present invention is directed to solving, at least in part, one of the technical problems in the related art. To this end, an object of the present invention is to provide a motor drive power adapter.
In order to achieve the above object, an embodiment of the present invention provides a motor drive power adapter, including:
a voltage transformation circuit for converting an input power supply voltage into a first direct current;
a dual voltage circuit connected to the transforming circuit to convert the first direct current into a second direct current and a third direct current, the second direct current having a voltage greater than a voltage of the third direct current;
the motor driving circuit is respectively connected with the dual-voltage circuit and the motor so as to generate driving signals through the second direct current and the third direct current;
and the controller is respectively connected with the voltage transformation circuit and the motor driving circuit so as to carry out voltage transformation control on the voltage transformation circuit and control the motor driving circuit to output the driving signal, thereby controlling the motor to rotate.
Further, according to an embodiment of the present invention, the voltage transformation circuit includes:
the drain electrode of the MOS tube Q8 is connected with the positive input end of the input power supply;
a MOS transistor Q9, wherein the drain electrode of the MOS transistor Q9 is connected with the source electrode of the MOS transistor Q8, and the source electrode of the MOS transistor Q9 is connected with the reference ground;
an inductor L1, wherein one end of the inductor L1 is connected with the source electrode of the MOS transistor Q8;
a capacitor C3, one end of the capacitor C3 is connected with the other end of the inductor L1, and the other end of the capacitor C3 is connected with the reference ground;
the PWM control end of the controller is connected with the grid of the MOS tube Q9, and the PWM control end of the controller is also connected with the grid of the MOS tube Q8 through an MOS drive circuit to output PWM signals to drive the MOS tube Q8 and the MOS tube Q9 to be alternately switched on or switched off, so that after the input power supply is subjected to PWM modulation, energy is stored and filtered through the inductor L1 and the capacitor C3, the first direct current is output.
Further, according to an embodiment of the present invention, the dual voltage circuit includes:
a diode D3, an anode of the diode D3 being connected to the first DC output terminal of the transformer circuit;
a capacitor C4, wherein one end of the capacitor C4 is connected with the cathode of the diode D3;
a capacitor C5, one terminal of the capacitor C5 is connected with the other terminal of the capacitor C4, and the other terminal of the capacitor C5 is connected with the reference ground;
both ends of the capacitor C4 are also respectively connected with the motor driving circuit to output the second direct current and the third direct current to the motor driving circuit.
Further, according to an embodiment of the present invention, the motor drive power adapter further includes: a voltage feedback circuit, the voltage feedback circuit comprising:
a resistor R11, one end of the resistor R11 is connected with the one end of the capacitor C5, and the other end of the resistor R11 is connected with a feedback voltage detection end of the controller;
and one end of the resistor R12 is connected with the other end of the resistor R11, and the other end of the resistor R12 is connected with the reference ground.
Further, according to an embodiment of the present invention, the motor drive circuit includes:
a transistor Q13, a collector of the transistor Q13 is connected to the second dc output terminal of the dual-voltage circuit, a collector of the transistor Q13 is further connected to a base of the transistor Q13 through a resistor R13, an emitter of the transistor Q13 is connected to a first power supply terminal of the motor, and a second power supply terminal of the motor is connected to the third dc output terminal of the dual-voltage circuit;
a transistor Q14, wherein the emitter of the transistor Q14 is connected with the emitter of the transistor Q13, the base of the transistor Q14 is connected with the base of the transistor Q13, and the collector of the transistor Q14 is connected with the reference ground;
the MOS tube Q15, the drain electrode of MOS tube Q15 is connected with the base electrode of triode Q14, the source electrode of MOS tube Q15 is connected with reference ground, the grid electrode of MOS tube Q15 is connected with the forward and reverse drive control end of controller through resistance R14, the grid electrode of MOS tube Q15 is also connected with reference ground through resistance R15.
Further, according to an embodiment of the present invention, the motor driving power adapter further includes: the collector of the triode Q13 is connected with the second direct current output end of the double-voltage circuit through the overcurrent detection circuit; wherein, the overcurrent detection circuit includes:
a resistor R8, wherein one end of the resistor R8 is connected to the second DC output end of the dual-voltage circuit;
a transistor Q12, a collector of the transistor Q12 is connected to the other end of the resistor R8, and an emitter of the transistor Q12 is connected to a collector of the transistor Q13;
a transistor Q10, an emitter of the transistor Q10 being connected to the one end of the resistor R8, a base of the transistor Q10 being connected to the other end of the resistor R8;
and a triode Q11, wherein the base of the triode Q11 is connected with the collector of the triode Q10 through a resistor R10, the emitter of the triode Q11 is connected with the reference ground, and the collector of the triode Q11 is connected with the base of the triode Q12.
Further, according to an embodiment of the present invention, the MOS drive circuit includes:
a MOS transistor Q7, the gate of the MOS transistor Q7 is connected with the PWM control end of the controller, the source of the MOS transistor Q7 is connected with the reference ground, and the drain of the MOS transistor Q7 is connected with the gate of the MOS transistor Q8 through a resistor R7;
one end of the charging capacitor C2 is connected to the reference ground, and the other end of the charging capacitor C2 is connected to the drain of the MOS transistor Q7 through a resistor R5;
a charging diode D2, a cathode of the charging diode D2 being connected with the one end of the charging capacitor C2;
the bias charging circuit is connected with the anode of the charging diode D2 so as to provide bias voltage for driving the MOS transistor Q8 to be conducted for the charging capacitor C2 through the charging diode D2.
Further, according to an embodiment of the present invention, the bias charging circuit includes:
a MOS transistor Q2, a gate of the MOS transistor Q2 is connected to the bias voltage control end of the controller, a source of the MOS transistor Q2 is connected to the ground, a drain of the MOS transistor Q2 is connected to one end of a resistor R2, and the other end of the resistor R2 is connected to the positive input end of the input power supply;
a transistor Q3, wherein the base of the transistor Q3 is connected with the drain of the MOS transistor Q2, and the collector of the transistor Q3 is connected with the reference ground;
a triode Q4, an emitter of the triode Q4 being connected with an emitter of the triode Q3, a collector of the triode Q4 being connected with the positive input end of the input power supply, and a base of the triode Q4 being connected with a base of the triode Q3;
a diode D1, the anode of the diode D1 being connected to the positive input of the bias supply voltage;
one end of the charging capacitor C1, one end of the charging capacitor C1 is connected to the cathode of the diode D1, and the other end of the charging capacitor C1 is connected to the emitter of the triode Q4.
Further, according to an embodiment of the present invention, the bias charging circuit further includes:
the MOS tube Q1, the MOS tube Q2 is connected with the bias voltage control end of the controller through the MOS tube Q1; the gate of the MOS transistor Q1 is connected to the bias voltage control terminal of the controller, the source of the MOS transistor Q1 is connected to ground, the drain of the MOS transistor Q1 is connected to the gate of the MOS transistor Q2, and the drain of the MOS transistor Q1 is further connected to a pull-up power source through a resistor R1.
Further, according to an embodiment of the present invention, the motor drive power adapter further includes: overcurrent capacity discharge circuit, overcurrent capacity discharge circuit includes:
a base electrode of the triode Q5 is connected with an overcurrent signal output end of the overcurrent detection circuit through a resistor R6, an emitter electrode of the triode Q5 is connected with a reference ground, and a collector electrode of the triode Q5 is connected with a pull-up power VCC through a resistor R3;
a MOS transistor Q6, a gate of the MOS transistor Q6 is connected to a collector of the transistor Q5, a source of the MOS transistor Q6 is connected to a ground reference, and a drain of the MOS transistor Q6 is connected to the other end of the charging capacitor C2 through a resistor R4.
The motor driving power adapter provided by the embodiment of the invention is used for converting an input power voltage into a first direct current through the voltage transformation circuit; the dual-voltage circuit is connected with the transformation circuit so as to convert the first direct current into a second direct current and a third direct current, wherein the voltage of the second direct current is greater than that of the third direct current; the motor driving circuit is respectively connected with the double-voltage circuit and the motor so as to generate a driving signal through the second direct current and the third direct current, and the controller performs voltage transformation control on the voltage transformation circuit and controls the motor driving circuit to output the driving signal so as to control the motor to rotate. The motor driving power adapter circuit is relatively simple and can meet the requirements of driving and controlling the direct current motor. The failure rate of the driving circuit is extremely low, and the production cost of enterprises is reduced.
Drawings
Fig. 1 is a schematic circuit diagram of a motor drive power adapter according to an embodiment of the present invention.
Reference numerals:
a MOS drive circuit 10;
a voltage transformation circuit 20;
a dual voltage circuit 30;
an overcurrent detection circuit 40;
a motor drive circuit 50;
a bias charging circuit 60;
an overcurrent capacitance discharge circuit 70;
a voltage feedback circuit 80.
The objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Referring to fig. 1, an embodiment of the present invention provides a motor drive power adapter including: the power supply comprises a transformation circuit 20, a dual-voltage circuit 30, a motor driving circuit 50 and a controller, wherein the transformation circuit 20 is used for converting an input power supply voltage into a first direct current; as shown in fig. 1, the power input terminal of the transformer circuit 20 is connected to an input power VDD to convert the input power and output the converted input power. The input power supply VDD may be provided by a dc power supply, or may be a dc output power supply obtained by rectifying and filtering ac power. For example, in one embodiment, the commercial ac power may be rectified into half-wave dc power by a rectifier bridge, and the half-wave dc power is stabilized by a capacitor, and then the stabilized first dc power is output.
The dual-voltage circuit 30 is connected to the transformer circuit 20 to convert the first direct current into a second direct current and a third direct current, wherein the voltage of the second direct current is greater than that of the third direct current; as shown in fig. 1, one path of the first direct current may be converted into two paths of direct currents by the dual voltage circuit 30 and output, and the voltages of the two paths of direct currents are different voltage values, so as to facilitate driving control of the dc motor.
The motor driving circuit 50 is connected to the dual voltage circuit 30 and the motor, respectively, to generate a driving signal by the second direct current and the third direct current. The motor driving circuit 50 generates and outputs a driving signal according to the second direct current and the third direct current to drive the motor to rotate.
The controller is respectively connected with the transformer circuit 20 and the motor driving circuit 50 to perform transformation control on the transformer circuit 20 and control the motor driving circuit 50 to output the driving signal, so as to control the motor to rotate. During the driving process of the direct current motor, the adjustment control of the rotating speed and the rotating direction of the direct current motor can be realized by changing the voltage and the current direction of the driving power supply. The controller is connected with the voltage transformation circuit 20 to control the voltage transformation circuit 20 to perform voltage transformation output on an input power supply VDD, the voltage transformation output power supply is converted by the dual voltage circuit 30 and then outputs two power supplies with different voltage values, the two power supplies with different voltage values are output to the motor driving circuit 50, and the motor driving circuit 50 outputs a motor driving power supply signal under the control of the controller, so that the motor is driven to rotate forwards or backwards, and the adjustment control of the rotating speed of the motor is performed.
The motor driving power adapter provided by the embodiment of the invention is used for converting the input power voltage into the first direct current through the voltage transformation circuit 20; the dual-voltage circuit 30 is connected with the transformer circuit 20 to convert the first direct current into a second direct current and a third direct current, wherein the voltage of the second direct current is greater than that of the third direct current; the motor driving circuit 50 is respectively connected to the dual voltage circuit 30 and the motor to generate a driving signal through the second direct current and the third direct current, and the controller performs a voltage transformation control on the voltage transformation circuit 20 and controls the motor driving circuit 50 to output the driving signal, thereby controlling the motor to rotate. The motor driving power adapter circuit is relatively simple and can meet the requirements of driving and controlling the direct current motor. The failure rate of the driving circuit is extremely low, and the production cost of enterprises is reduced.
The voltage transformation circuit 20 includes: the MOS tube Q8, the MOS tube Q9, the inductor L1 and the capacitor C3, wherein the drain of the MOS tube Q8 is connected with the positive input end of an input power supply VDD; the drain electrode of the MOS transistor Q9 is connected with the source electrode of the MOS transistor Q8, and the source electrode of the MOS transistor Q9 is connected with the reference ground; one end of the inductor L1 is connected with the source electrode of the MOS transistor Q8; one end of the capacitor C3 is connected with the other end of the inductor L1, and the other end of the capacitor C3 is connected with the reference ground; the PWM control end of the controller is connected with the grid of the MOS tube Q9, the PWM control end of the controller is also connected with the grid of the MOS tube Q8 through the MOS drive circuit 10 to output PWM signals to drive the MOS tube Q8 and the MOS tube Q9 to be alternately switched on or switched off, so that after the input power supply is subjected to PWM modulation, energy is stored and filtered through the inductor L1 and the capacitor C3, the first direct current is output. As shown in fig. 1, a PWM pulse width modulation signal may be output by the controller, so as to perform switching control on the MOS transistors Q8 and Q9. To convert the input power supply VDD to the first direct current. Specifically, the controller controls the MOS transistor Q8 and the MOS transistor Q9 to be alternately turned on or off. Therefore, the inductor L1 is charged and discharged, and when the controller outputs a low level, the MOS transistor Q8 is turned on, and the MOS transistor Q9 is turned off. The input power supply VDD charges the inductor L1 and the capacitor C3 through the MOS transistor Q8. When the controller outputs a high level, the MOS transistor Q8 is turned off, and the MOS transistor Q9 is turned on. The inductor L1 discharges through the MOS transistor Q9 while continuing to charge the capacitor C3. The first direct current is stabilized by the filter voltage of the capacitor C3, so that the stability of the first direct current is ensured. The controller can adjust and control the output voltage of the first direct current by adjusting the duty ratio of the output PWM signal.
Preferably, the dual voltage circuit includes: a diode D3, a capacitor C4 and a capacitor C5, wherein the anode of the diode D3 is connected with the first DC output end of the voltage transformation circuit; one end of the capacitor C4 is connected with the cathode of the diode D3; one end of the capacitor C5 is connected with the other end of the capacitor C4, and the other end of the capacitor C5 is connected with the reference ground; both ends of the capacitor C4 are also respectively connected with the motor driving circuit to output the second direct current and the third direct current to the motor driving circuit. As shown in fig. 1, the capacitor C5 and capacitor C4 are charged by the unidirectional conductivity of the diode D3. The second direct current can be output through the capacitor C4. The capacitor C5 and the capacitor C4 form a series charging circuit, so that a capacitor voltage dividing circuit is arranged between the capacitor C5 and the capacitor C4, and the capacitor C5 outputs the third direct current. In one embodiment of the present invention, the capacitor C4 and the capacitor C5 have the same capacitance value, so that the voltage of the third direct current is half of the second direct current.
In another embodiment, the dual voltage circuit 30 includes: a diode D3, a diode D4, a capacitor C5 and a capacitor C4, wherein an anode of the diode D3 is connected to the first DC output terminal of the transformer circuit 20; the cathode of the diode D4 is connected to the first dc output; one end of the capacitor C5 is connected with the anode of the diode D4, and the other end of the capacitor C5 is connected with the reference ground; one end of the capacitor C4 is connected to the cathode of the diode D3, the other end of the capacitor C4 is connected to the anode of the diode D4, and both ends of the capacitor C4 are respectively connected to the motor driving circuit 50, so as to output the second direct current and the third direct current to the motor driving circuit 50. As shown in fig. 1, the capacitor C5 and capacitor C4 are charged by the unidirectional conductivity of the diode D3. The second direct current can be output through the capacitor C4. The capacitor C5 and the capacitor C4 form a series charging circuit, so that a capacitor voltage dividing circuit is arranged between the capacitor C5 and the capacitor C4, and the capacitor C5 outputs the third direct current. In one embodiment of the present invention, the capacitor C4 and the capacitor C5 have the same capacitance value, so that the voltage of the third direct current is half of the second direct current. Through the one-way conductivity of the diode D4, the capacitor C5 can be discharged to the outside, and the stability of the voltage of the third direct current is ensured.
The motor drive power adapter further includes: the voltage feedback circuit 80 comprises a resistor R11 and a resistor R12, one end of the resistor R11 is connected with the one end of the capacitor C5, and the other end of the resistor R11 is connected with a feedback voltage detection end of the controller; one end of the resistor R12 is connected with the other end of the resistor R11, and the other end of the resistor R12 is connected with the reference ground. The resistor R11 and the resistor R12 form a voltage division circuit. And after voltage of the third direct current is divided, the voltage is fed back to a voltage feedback end of the controller, and the controller can adjust and control the duty ratio of an output PWM (pulse width modulation) signal according to a feedback voltage value so as to ensure the stability of the second direct current and the third direct current or adjust and control the voltage of the second direct current and the third direct current.
The motor driving circuit 50 comprises a triode Q13, a triode Q14 and a MOS transistor Q15, wherein a collector of the triode Q13 is connected with the second direct current output end of the dual-voltage circuit 30, a collector of the triode Q13 is further connected with a base of the triode Q13 through a resistor R13, an emitter of the triode Q13 is connected with a first power supply end of the motor, and the second power supply end of the motor is connected with the third direct current output end of the dual-voltage circuit 30; the emitter of the transistor Q14 is connected with the emitter of the transistor Q13, the base of the transistor Q14 is connected with the base of the transistor Q13, and the collector of the transistor Q14 is connected with the reference ground; the drain electrode of the MOS tube Q15 is connected with the base electrode of the triode Q14, the source electrode of the MOS tube Q15 is connected with the reference ground, the grid electrode of the MOS tube Q15 is connected with the forward and reverse driving control end of the controller through a resistor R14, and the grid electrode of the MOS tube Q15 is also connected with the reference ground through a resistor R15. As shown in fig. 1, the controller may perform switching control on the MOS transistor Q15. So as to control the on/off of the transistor Q13 and the transistor Q14 through the MOS transistor Q15. The transistor Q13 and the transistor Q14 form a common emitter circuit, and are alternately turned on under the driving of the MOS transistor Q15, so as to output a driving power to the motor to drive the motor to rotate in the forward direction or the reverse direction. When the controller outputs a low level signal to the gate of the MOS transistor Q15, the MOS transistor Q15 is turned off, the transistor Q13 is turned on, the transistor Q14 is turned off, and the driving power is inputted to the positive terminal of the motor and outputted through the negative terminal of the motor, so that the motor is driven to rotate in the forward direction. When the controller outputs a high level signal to the gate of the MOS transistor Q15, the MOS transistor Q15 is turned on, the transistor Q14 is turned on, the transistor Q13 is turned off, and the driving power is input from the negative terminal of the motor and output from the positive terminal of the motor, so that the motor is driven to rotate reversely.
The motor drive power adapter further includes: the overcurrent detection circuit 40, the collector of the triode Q13 is connected with the second dc output end of the dual-voltage circuit 30 through the overcurrent detection circuit 40; wherein, the over-current detection circuit 40 includes: the circuit comprises a resistor R8, a triode Q12, a triode Q10 and a triode Q11, wherein one end of the resistor R8 is connected with a second direct current output end of the dual-voltage circuit 30; the collector of the triode Q12 is connected with the other end of the resistor R8, and the emitter of the triode Q12 is connected with the collector of the triode Q13; the emitter of the transistor Q10 is connected with the one end of the resistor R8, and the base of the transistor Q10 is connected with the other end of the resistor R8; the base of the triode Q11 is connected with the collector of the triode Q10 through a resistor R10, the emitter of the triode Q11 is connected with the reference ground, and the collector of the triode Q11 is connected with the base of the triode Q12. As shown in fig. 1, an overcurrent protection circuit is formed by the resistor R8, the transistor Q10, the transistor Q11 and the transistor Q12, so as to perform overcurrent or short-circuit protection on the second dc power supply loop. The working process is as follows: when the power supply loop is short-circuited, the current of the power supply loop is increased, the current of the resistor R8 is increased, the voltage difference between the two ends is increased, and the transistor Q10 is turned on. At this time, the transistor Q11 is also turned on, and since the transistor Q11 is turned on, the base of the transistor Q12 is pulled low, the transistor Q12 is turned off, and the power supply of the second dc power supply stops outputting, thereby implementing overcurrent/short circuit protection. The phenomena of burning out the motor and even firing are avoided. On the contrary, in normal operation, the voltage across the resistor R8 is small, so that the transistor Q10 cannot be turned on, the transistor Q11 is also turned off, the transistor Q12 is in a normal conduction state, and the second dc power supply supplies power for normal output.
The MOS drive circuit 10 includes: a MOS tube Q7, a charging capacitor C2, a charging diode D2 and a bias charging circuit 60, wherein the gate of the MOS tube Q7 is connected with the PWM control end of the controller, the source of the MOS tube Q7 is connected with the reference ground, and the drain of the MOS tube Q7 is connected with the gate of the MOS tube Q8 through a resistor R7; one end of the charging capacitor C2 is connected with the reference ground, and the other end of the charging capacitor C2 is connected with the drain electrode of the MOS transistor Q7 through a resistor R5; the cathode of the charging diode D2 is connected with the one end of the charging capacitor C2; the bias charging circuit 60 is connected to the anode of the charging diode D2 to provide the charging capacitor C2 with a bias voltage for driving the MOS transistor Q8 to conduct through the charging diode D2. As shown in fig. 1, the MOS transistor Q8 is an N-channel MOS transistor, and the MOS transistor Q8 is driven to be conductive. The voltage between the gate and the source of the MOS transistor Q8 needs to be greater than the turn-on voltage, so that a voltage higher than the input power VDD needs to be provided to the gate of the MOS transistor Q8. This voltage value is provided by the bias charging circuit 60. The bias voltage output by the bias charging circuit 60 charges the charging capacitor C2 through the diode D2, so that the voltage on the capacitor C2 is equal to the bias voltage output by the bias charging circuit 60. Through the one-way conductivity of the diode D2, the voltage of the charging capacitor C2 is prevented from flowing backwards, and the stability of the voltage on the charging capacitor C2 is ensured. Through the MOS pipe Q7, the drive control can be carried out on the MOS pipe Q8 under the action of the controller, and when the MOS pipe Q7 is cut off under the control of the controller, the voltage charged by the charging capacitor C2 acts on the grid electrode of the MOS pipe Q8, so that the MOS pipe Q8 is switched on. When the MOS transistor Q7 is turned on under the control of the controller, the gate of the MOS transistor Q8 is at a low level. So that the MOS transistor Q8 is turned off.
The bias charging circuit 60 includes: the controller comprises a MOS tube Q2, a triode Q3, a triode Q4, a diode D1 and a charging capacitor C1, wherein the grid electrode of the MOS tube Q2 is connected with the bias voltage control end of the controller, the source electrode of the MOS tube Q2 is connected with the reference ground, the drain electrode of the MOS tube Q2 is connected with one end of a resistor R2, and the other end of the resistor R2 is connected with the positive input end of the input power supply; the base electrode of the triode Q3 is connected with the drain electrode of the MOS tube Q2, and the collector electrode of the triode Q3 is connected with the reference ground; the emitter of the transistor Q4 is connected to the emitter of the transistor Q3, the collector of the transistor Q4 is connected to the positive input of the input power source, and the base of the transistor Q4 is connected to the base of the transistor Q3; the anode of the diode D1 is connected with the positive input end of the bias supply voltage; one end of the charging capacitor C1 is connected to the cathode of the diode D1, and the other end of the charging capacitor C1 is connected to the emitter of the transistor Q4. The MOS transistor Q2, the transistor Q3, the transistor Q4, the diode D1 and the charging capacitor C1 form a bias charging circuit 60 to generate the bias voltage. As shown in fig. 1, when the MOS transistor Q2 is turned on under the control of the controller, the transistor Q3 is also turned on, and the positive input terminal of the bias power supply VCC charges the charging capacitor C1 through the diode D1, so that the voltage of the charging capacitor C1 reaches the voltage value of the bias power supply voltage VCC. After that, the controller controls the MOS transistor Q2 to be cut off. At this time, the transistor Q4 is turned on, and the voltage of the input power VDD is applied to the ground terminal of the charging capacitor C1, so as to raise the voltage of the charging capacitor C1 to the voltage value of the input power VDD + the bias power VCC. In addition, the reverse current sinking of the charging capacitor C1 can be avoided by the unidirectional conductivity of the diode D1. Thus, the voltage of the charging capacitor C1 is the input power VDD + bias supply VCC. The power supply voltage can charge the charging capacitor C2 through the diode D2, so that the voltage on the capacitor C2 is equal to the voltage of the input power VDD + the bias power VCC, and the voltage can make the MOS transistor Q8 conduct.
The bias charging circuit 60 further includes: the MOS tube Q1, the MOS tube Q2 is connected with the bias voltage control end of the controller through the MOS tube Q1; the gate of the MOS transistor Q1 is connected to the bias voltage control terminal of the controller, the source of the MOS transistor Q1 is connected to ground, the drain of the MOS transistor Q1 is connected to the gate of the MOS transistor Q2, and the drain of the MOS transistor Q1 is further connected to a pull-up power source through a resistor R1. The MOS transistor Q1 is arranged between the MOS transistor Q2 and the controller. In this way, the output signal of the controller may be amplified and then output to the MOS transistor Q2, so as to perform fast on/off control on the MOS transistor Q2.
The motor drive power adapter further includes: an overcurrent capacitance discharge circuit 70, the overcurrent capacitance discharge circuit 70 comprising: a transistor Q5 and a MOS transistor Q6, wherein a base of the transistor Q5 is connected to an overcurrent signal output terminal (a collector of the transistor Q11) of the overcurrent detection circuit 40 through a resistor R6, an emitter of the transistor Q5 is connected to a reference ground, and a collector of the transistor Q5 is connected to a pull-up power supply (bias power supply VCC) through a resistor R3; the gate of the MOS transistor Q6 is connected to the collector of the transistor Q5, the source of the MOS transistor Q6 is connected to the ground, and the drain of the MOS transistor Q6 is connected to the other end of the charging capacitor C2 via a resistor R4.
As shown in fig. 1, in particular, the supply circuit of the second direct current can be overcurrent-protected by the overcurrent detection circuit 40. At this time, since the transforming circuit 20 continues to output the transforming current, the third dc current can also continue to supply power to the motor. Similarly, the third dc power supply also has an overcurrent phenomenon. In order to further protect the security. At this time, the first direct current may be controlled to stop the transformed power output. Since the voltage transformation circuit 20 can be controlled by the MOS driver circuit 10, the MOS driver circuit 10 can be controlled by the over-current capacitor discharge circuit 70 to control the voltage transformation circuit to stop the first circuit output. As shown in fig. 1, when the overcurrent detection circuit 40 detects an overcurrent, the collector of the transistor Q11 outputs a low level, which turns off the transistor Q5. The gate of the MOS transistor Q6 is a high signal, so that the MOS transistor Q6 is turned on. At this time, the capacitor C2 discharges through the resistor R4, so that the voltage value across the capacitor C2 is smaller than the on voltage value of the MOS transistor Q8, and the MOS transistor Q8 is in an off state. Thus, the transformer circuit 20 has no first direct current output, and the over-current protection of the whole circuit is realized.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing detailed description, or equivalent changes may be made in some of the features of the embodiments. All equivalent structures made by using the contents of the specification and the attached drawings of the invention can be directly or indirectly applied to other related technical fields, and all the equivalent structures are within the protection scope of the invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made in the above embodiments by those of ordinary skill in the art without departing from the principle and spirit of the present invention.

Claims (10)

1. A motor drive power adapter, comprising:
a voltage transformation circuit for converting an input power supply voltage into a first direct current;
a dual voltage circuit connected to the transforming circuit to convert the first direct current into a second direct current and a third direct current, the second direct current having a voltage greater than a voltage of the third direct current;
the motor driving circuit is respectively connected with the dual-voltage circuit and the motor so as to generate driving signals through the second direct current and the third direct current;
and the controller is respectively connected with the voltage transformation circuit and the motor driving circuit so as to carry out voltage transformation control on the voltage transformation circuit and control the motor driving circuit to output the driving signal, thereby controlling the motor to rotate.
2. The motor drive power adapter of claim 1, wherein the transformation circuit comprises:
the drain electrode of the MOS tube Q8 is connected with the positive input end of the input power supply;
a MOS transistor Q9, wherein the drain electrode of the MOS transistor Q9 is connected with the source electrode of the MOS transistor Q8, and the source electrode of the MOS transistor Q9 is connected with the reference ground;
an inductor L1, wherein one end of the inductor L1 is connected with the source electrode of the MOS transistor Q8;
a capacitor C3, one end of the capacitor C3 is connected with the other end of the inductor L1, and the other end of the capacitor C3 is connected with the reference ground;
the PWM control end of controller with MOS pipe Q9's grid connection, the PWM control end of controller still through MOS drive circuit with MOS pipe Q8's grid connection to output PWM signal drive MOS pipe Q8 and MOS pipe Q9 turn on or cut off in turn to carry out PWM modulation with the input power, and pass through behind inductance L1 and electric capacity C3 energy storage and the filtering, output first direct current.
3. A motor drive power adapter according to claim 2, wherein the dual voltage circuit comprises:
a diode D3, an anode of the diode D3 being connected to the first DC output terminal of the transformer circuit;
a capacitor C4, wherein one end of the capacitor C4 is connected with the cathode of the diode D3;
a capacitor C5, one terminal of the capacitor C5 is connected with the other terminal of the capacitor C4, and the other terminal of the capacitor C5 is connected with the reference ground;
both ends of the capacitor C4 are also respectively connected with the motor driving circuit to output the second direct current and the third direct current to the motor driving circuit.
4. The motor drive power adapter according to claim 3, further comprising: a voltage feedback circuit, the voltage feedback circuit comprising:
a resistor R11, one end of the resistor R11 is connected with the one end of the capacitor C5, and the other end of the resistor R11 is connected with a feedback voltage detection end of the controller;
and one end of the resistor R12 is connected with the other end of the resistor R11, and the other end of the resistor R12 is connected with the reference ground.
5. The motor drive power adapter according to claim 2, wherein the motor drive circuit includes:
a transistor Q13, a collector of the transistor Q13 is connected to the second dc output terminal of the dual-voltage circuit, a collector of the transistor Q13 is further connected to a base of the transistor Q13 through a resistor R13, an emitter of the transistor Q13 is connected to a first power supply terminal of the motor, and a second power supply terminal of the motor is connected to the third dc output terminal of the dual-voltage circuit;
a transistor Q14, an emitter of the transistor Q14 is connected with an emitter of the transistor Q13, a base of the transistor Q14 is connected with a base of the transistor Q13, and a collector of the transistor Q14 is connected with a reference ground;
the drain of the MOS transistor Q15 is connected with the base of the triode Q14, the source of the MOS transistor Q15 is connected with the reference ground, the gate of the MOS transistor Q15 is connected with the forward and reverse driving control end of the controller through a resistor R14, and the gate of the MOS transistor Q15 is further connected with the reference ground through a resistor R15.
6. The motor drive power adapter according to claim 5, further comprising: the collector of the triode Q13 is connected with the second direct current output end of the dual-voltage circuit through the overcurrent detection circuit; wherein, the overcurrent detection circuit includes:
a resistor R8, wherein one end of the resistor R8 is connected to the second DC output end of the dual-voltage circuit;
a transistor Q12, a collector of the transistor Q12 is connected to the other end of the resistor R8, and an emitter of the transistor Q12 is connected to a collector of the transistor Q13;
a transistor Q10, an emitter of the transistor Q10 being connected to the one end of the resistor R8, a base of the transistor Q10 being connected to the other end of the resistor R8;
and a triode Q11, wherein the base of the triode Q11 is connected with the collector of the triode Q10 through a resistor R10, the emitter of the triode Q11 is connected with the reference ground, and the collector of the triode Q11 is connected with the base of the triode Q12.
7. The motor drive power adapter according to claim 6, wherein the MOS drive circuit includes:
a MOS transistor Q7, the gate of the MOS transistor Q7 is connected with the PWM control end of the controller, the source of the MOS transistor Q7 is connected with the reference ground, and the drain of the MOS transistor Q7 is connected with the gate of the MOS transistor Q8 through a resistor R7;
one end of the charging capacitor C2 is connected to the reference ground, and the other end of the charging capacitor C2 is connected to the drain of the MOS transistor Q7 through a resistor R5;
a charging diode D2, a cathode of the charging diode D2 being connected with the one end of the charging capacitor C2;
the bias charging circuit is connected with the anode of the charging diode D2 so as to provide bias voltage for driving the MOS transistor Q8 to be conducted for the charging capacitor C2 through the charging diode D2.
8. The motor drive power adapter of claim 7, wherein the bias charging circuit comprises:
a MOS transistor Q2, a gate of the MOS transistor Q2 is connected to the bias voltage control end of the controller, a source of the MOS transistor Q2 is connected to the ground, a drain of the MOS transistor Q2 is connected to one end of a resistor R2, and the other end of the resistor R2 is connected to the positive input end of the input power supply;
a transistor Q3, wherein the base of the transistor Q3 is connected with the drain of the MOS transistor Q2, and the collector of the transistor Q3 is connected with the reference ground;
a transistor Q4, an emitter of the transistor Q4 is connected to an emitter of the transistor Q3, a collector of the transistor Q4 is connected to the positive input terminal of the input power source, and a base of the transistor Q4 is connected to a base of the transistor Q3;
a diode D1, the anode of the diode D1 being connected to the positive input of the bias supply voltage;
one end of the charging capacitor C1 is connected with the cathode of the diode D1, and the other end of the charging capacitor C1 is connected with the emitter of the triode Q4.
9. The motor drive power adapter of claim 8, wherein the bias charging circuit further comprises:
the MOS tube Q1, the MOS tube Q2 is connected with the bias voltage control end of the controller through the MOS tube Q1; the gate of the MOS transistor Q1 is connected to the bias voltage control terminal of the controller, the source of the MOS transistor Q1 is connected to ground, the drain of the MOS transistor Q1 is connected to the gate of the MOS transistor Q2, and the drain of the MOS transistor Q1 is further connected to a pull-up power source through a resistor R1.
10. The motor drive power adapter according to claim 7, further comprising: overcurrent capacity discharge circuit, overcurrent capacity discharge circuit includes:
a transistor Q5, a base of the transistor Q5 is connected to an overcurrent signal output terminal of the overcurrent detection circuit through a resistor R6, an emitter of the transistor Q5 is connected to a reference ground, and a collector of the transistor Q5 is connected to a pull-up power supply through a resistor R3;
a MOS transistor Q6, a gate of the MOS transistor Q6 is connected to a collector of the transistor Q5, a source of the MOS transistor Q6 is connected to a ground reference, and a drain of the MOS transistor Q6 is connected to the other end of the charging capacitor C2 through a resistor R4.
CN202210647749.XA 2022-06-09 2022-06-09 Motor drive power adapter Active CN114744929B (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08207663A (en) * 1995-02-01 1996-08-13 Ichikoh Ind Ltd Controller for electrically-driven housed mirror
JP2000168450A (en) * 1998-12-07 2000-06-20 Asahi National Lighting Co Ltd Motor control circuit
JP2005151644A (en) * 2003-11-12 2005-06-09 Sharp Corp Motor driving device
CN204681274U (en) * 2015-06-08 2015-09-30 无锡机电高等职业技术学校 A kind of brshless DC motor metal-oxide-semiconductor drive circuit
CN105871212A (en) * 2016-06-15 2016-08-17 晶傲威电气（常州）有限公司 Power conversion device applied to high-speed flywheel energy storage system
US20160308476A1 (en) * 2013-11-29 2016-10-20 Arcelik Anonim Sirketi Household appliance with multiple synchronous motors and control circuit thereof
CN107508260A (en) * 2017-09-01 2017-12-22 北京机械设备研究所 A kind of DC motor control circuit based on excessively stream automatic shutoff
CN109617020A (en) * 2018-12-28 2019-04-12 无锡新大力电机有限公司 Inexpensive motor actuator sensor power supply overload protecting circuit

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08207663A (en) * 1995-02-01 1996-08-13 Ichikoh Ind Ltd Controller for electrically-driven housed mirror
JP2000168450A (en) * 1998-12-07 2000-06-20 Asahi National Lighting Co Ltd Motor control circuit
JP2005151644A (en) * 2003-11-12 2005-06-09 Sharp Corp Motor driving device
US20160308476A1 (en) * 2013-11-29 2016-10-20 Arcelik Anonim Sirketi Household appliance with multiple synchronous motors and control circuit thereof
CN204681274U (en) * 2015-06-08 2015-09-30 无锡机电高等职业技术学校 A kind of brshless DC motor metal-oxide-semiconductor drive circuit
CN105871212A (en) * 2016-06-15 2016-08-17 晶傲威电气（常州）有限公司 Power conversion device applied to high-speed flywheel energy storage system
CN107508260A (en) * 2017-09-01 2017-12-22 北京机械设备研究所 A kind of DC motor control circuit based on excessively stream automatic shutoff
CN109617020A (en) * 2018-12-28 2019-04-12 无锡新大力电机有限公司 Inexpensive motor actuator sensor power supply overload protecting circuit

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