CN211579843U - Brushless servo motor of direct current three-phase operation - Google Patents
Brushless servo motor of direct current three-phase operation Download PDFInfo
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- CN211579843U CN211579843U CN202020055678.0U CN202020055678U CN211579843U CN 211579843 U CN211579843 U CN 211579843U CN 202020055678 U CN202020055678 U CN 202020055678U CN 211579843 U CN211579843 U CN 211579843U
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Abstract
The utility model relates to a direct current motor technical field provides a brushless servo motor of direct current three-phase operation. This motor includes three-phase bridge type inverter circuit, still includes stator, NS permanent magnet rotor, rotor position detector, pulse width modulator and controller, be equipped with the three-phase winding of triangular connection on the stator, it is many right NS permanent magnet rotor equipartition is on stator shell's inner circumferential surface, rotor position detector has six, six rotor position detector is along circumference fixed setting on the stator, rotor position detector with pulse width modulator's output all with the input electricity of controller is connected, three-phase bridge type inverter circuit's input with the output electricity of controller is connected, three-phase bridge type inverter circuit's output with the three-phase winding electricity is connected. The utility model provides a pair of brushless servo motor of direct current three-phase operation makes brushless servo motor's of direct current three-phase operation control accuracy no longer restricted.
Description
Technical Field
The utility model relates to a direct current motor technical field, concretely relates to brushless servo motor of direct current three-phase operation.
Background
The existing direct current brushless servo motor is in star connection, and when the motor operates, a three-phase electromagnetic winding always has one phase to be de-energized, so that the torque imbalance and vibration of the motor during the operation are caused. The patent number CN1655428A discloses a program-controlled brushless dc motor, which can make three-phase electromagnetic windings energized when the dc brushless servo motor operates, and make the torque of the motor more balanced when the motor operates.
The servo motor encoder is a sensor which is arranged on the servo motor and used for measuring the magnetic pole position, the rotating angle and the rotating speed of the servo motor, the servo motor encoder can be divided into a photoelectric encoder and a magnetoelectric encoder according to the difference of physical media, and the photoelectric encoder is basically used in the market. The photoelectric encoder is composed of a grating disc and a photoelectric detection device. The grating disk is formed by equally dividing a circular plate with a certain diameter into a plurality of rectangular holes. Because the photoelectric code disc is coaxial with the motor, when the motor rotates, the grating disc rotates at the same speed as the motor, a plurality of pulse signals are detected and output by a detection device composed of electronic elements such as light emitting diodes, and the current rotating speed of the motor can be reflected by calculating the number of pulses output by the photoelectric encoder per second.
Therefore, there is a manufacturing limit to the photoelectric encoder, resulting in a limitation in the control accuracy of the above-described program-controlled brushless dc motor.
SUMMERY OF THE UTILITY MODEL
To the defect among the prior art, the utility model aims at providing a brushless servo motor of direct current three-phase operation makes its control accuracy no longer restricted.
In order to achieve the above purpose, the present invention is implemented by the following technical solutions: the utility model provides a brushless servo motor of direct current three-phase operation, includes three-phase bridge type inverter circuit, still includes stator, NS permanent magnet rotor, rotor position detector, pulse width modulator and controller, be equipped with the three-phase winding of triangular connection on the stator, it is many right NS permanent magnet rotor equipartition is on stator shell's inner circumferential surface, rotor position detector has six, six rotor position detector is along the fixed setting of circumference on the stator, rotor position detector with pulse width modulator's output all with the input electricity of controller is connected, three-phase bridge type inverter circuit's input with the output electricity of controller is connected, three-phase bridge type inverter circuit's output with the three-phase winding electricity is connected.
Further, the rotor position detector is a hall sensor.
Further, the three-phase bridge inverter circuit comprises six field effect tubes and peripheral components, wherein a first field effect tube, a third field effect tube and a fifth field effect tube form an upper bridge arm of the three-phase bridge inverter circuit, a second field effect tube, a fourth field effect tube and a sixth field effect tube form a lower bridge arm of the three-phase bridge inverter circuit, source electrodes of the first field effect tube, the third field effect tube and the fifth field effect tube are respectively and electrically connected with drain electrodes of the second field effect tube, the fourth field effect tube and the sixth field effect tube, common contact points of the first field effect tube, the third field effect tube and the fifth field effect tube are respectively and electrically connected with the three-phase winding, control gates of the six field effect tubes are respectively and electrically connected with an output end of the controller and a positive end of the direct current power supply, drain electrodes of the first field effect tube, the third field effect tube and the fifth field effect tube are respectively and electrically connected, and the source electrodes of the second field effect transistor, the fourth field effect transistor and the sixth field effect transistor are respectively and electrically connected with the negative electrode end of the direct-current power supply.
Further, the controller is a single chip microcomputer.
The utility model has the advantages that: the utility model provides a pair of brushless servo motor of direct current three-phase operation, the photoelectric encoder that traditional servo motor was replaced to the position pulse number of NS permanent magnet rotor has solved photoelectric encoder because the manufacturing limit problem that the size reason exists makes brushless servo motor of direct current three-phase operation's control accuracy no longer limited.
Drawings
Fig. 1 is a schematic diagram of an internal structure of a dc three-phase operation brushless servo motor;
FIG. 2 is a schematic diagram of the connection between the DC three-phase operation brushless servo motor and the controller;
fig. 3 is a wiring diagram of the controller.
Reference numerals: 1-NS permanent magnet rotor, 2-stator housing, 3-rotor position detector, 4-three phase winding.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.
In this application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present application, it is to be understood that the terms "longitudinal," "lateral," "horizontal," "top," "bottom," "upper," "lower," "inner" and "outer" and the like are used in the orientation or positional relationship shown in the drawings, which are used for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
As shown in fig. 1-3, the present invention provides a dc three-phase operating brushless servo motor, which comprises a stator, an NS permanent magnet rotor, and a rotor position detector 3. Preferably, the stator is provided with a three-phase winding 4 in delta connection, and the servo motor in delta connection has higher specific power. The three-phase windings 4 are connected in series into a triangular load electromagnetic coil according to every three adjacent groups of coils, and the triangular load electromagnetic coils are connected in parallel. Pairs of NS permanent magnet rotors are uniformly distributed on the inner circumferential surface of the stator housing 2. The rotor position detectors 3 have six, and the six rotor position detectors 3 are fixedly arranged on the stator along the circumferential direction and used for detecting the position of the NS permanent magnet rotor in real time.
The three-phase bridge inverter circuit further comprises a protection circuit, a pulse width modulator, a controller and a three-phase bridge inverter circuit. The output ends of the rotor position detector 3, the protection circuit and the pulse width modulator are electrically connected with the input end of the controller, the input end of the three-phase bridge type inverter circuit is electrically connected with the output end of the controller, and the output end of the three-phase bridge type inverter circuit is electrically connected with the three-phase winding 4. The protection circuit adopts overcurrent protection or overvoltage protection and is used for ensuring the circuit operation safety of the control system.
When the brushless servo motor runs in the direct-current three-phase operation mode, the number of position pulses of the NS permanent magnet rotor replaces a photoelectric encoder of a traditional servo motor to serve as input, and the position pulses are output to the controller. After being processed by the controller, the direct current three-phase operation brushless servo motor is transmitted to the three-phase bridge type inverter circuit to control the on-off of upper and lower bridge power switch devices in the three-phase bridge type inverter circuit, so that the direct current three-phase operation brushless servo motor can be ensured to normally operate in a state that the three-phase windings 4 are electrified simultaneously.
In one embodiment, the rotor position detector 3 is a hall sensor. The Hall sensor has the characteristics of high sensitivity, good linearity and stability, small volume, high temperature resistance and the like. The position of the permanent magnet in the motor can be accurately measured, and the cost is low.
In one embodiment, the three-phase bridge inverter circuit comprises six field effect transistors and peripheral components. The first field effect transistor, the third field effect transistor and the fifth field effect transistor form an upper bridge arm of the three-phase bridge type inverter circuit, and the second field effect transistor, the fourth field effect transistor and the sixth field effect transistor form a lower bridge arm of the three-phase bridge type inverter circuit. The source electrodes of the first field effect tube, the third field effect tube and the fifth field effect tube are respectively and electrically connected with the drain electrodes of the second field effect tube, the fourth field effect tube and the sixth field effect tube, the common contact points of the first field effect tube, the third field effect tube and the fifth field effect tube are respectively and electrically connected with the three-phase winding, and the control gates of the six field effect tubes are respectively and electrically connected with the output end of the controller and the positive end of the direct current power supply. The drain electrodes of the first field effect tube, the third field effect tube and the fifth field effect tube are respectively and electrically connected with the positive end of the direct current power supply, and the source electrodes of the second field effect tube, the fourth field effect tube and the sixth field effect tube are respectively and electrically connected with the negative end of the direct current power supply.
In one embodiment, as shown in fig. 2, the first fet, the third fet, and the fifth fet are denoted by q1, q3, and q5, respectively, and the second fet, the fourth fet, and the sixth fet are denoted by q2, q4, and q6, respectively. And the rotor position signal is transmitted to the controller for processing, and the controller generates a circulating signal to drive the on-off of an upper bridge power switch device and a lower bridge power switch device in the three-phase bridge type inverter circuit.
The field effect transistors q1 and q4 are conducted, and the current directions of the three-phase winding 4 are A-B and A-C-B;
the field effect transistors q1, q4 and q6 are switched on, and the current directions of the three-phase winding 4 are A-B, A-C-B and A-C;
the field effect transistors q1, q3 and q6 are switched on, and the current directions of the three-phase winding 4 are A-C, B-C and A-B-C;
the field effect transistors q3 and q6 are conducted, and the current directions of the three-phase winding 4 are B-C and B-A-C;
the field effect transistors q3, q6 and q2 are switched on, and the current directions of the three-phase winding 4 are B-C, B-A and B-A-C;
the field effect transistors q3, q5 and q2 are switched on, and the current directions of the three-phase winding 4 are B-A, C-A and B-C-A;
the field effect transistors q5 and q2 are conducted, and the current directions of the three-phase winding 4 are C-A and C-B-A;
the field effect transistors q5, q4 and q2 are switched on, and the current directions of the three-phase winding 4 are C-A, C-B and C-B-A;
the field effect transistors Q1, Q5 and Q4 are conducted, and the current directions of the three-phase winding 4 are C-B, A-B and C-A-B.
The conduction sequence of the field effect transistors forms a period cycle, so that three-phase electromagnetic windings of the direct-current three-phase operation brushless servo motor are all kept electrified, and no commutation and de-electrification dead zone exists.
In one embodiment, the controller is preferably a single chip microcomputer with an analog-to-digital conversion function. Necessary programs are burnt in the single chip microcomputer, and the single chip microcomputer is guaranteed to correctly process input signals. In addition, the single chip microcomputer is wide in source and low in cost, and can be replaced in time after being damaged. The photoelectric encoder which replaces the traditional servo motor by the position pulse number of the NS permanent magnet rotor is used as an input to replace the traditional servo motor, so that the problem of manufacturing limit of the photoelectric encoder due to size is solved, the problem of high cost of the photoelectric encoder is solved, the price of the traditional servo motor is reduced, and the market promotion is facilitated.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. The utility model provides a brushless servo motor of direct current three-phase operation, includes three-phase bridge type inverter circuit, its characterized in that: the three-phase bridge type inverter comprises a stator, an NS permanent magnet rotor, six rotor position detectors, a pulse width modulator and a controller, wherein the stator is provided with three-phase windings in triangular connection, the NS permanent magnet rotor is uniformly distributed on the inner circumferential surface of a stator shell, the six rotor position detectors are fixedly arranged on the stator along the circumferential direction, the output ends of the rotor position detectors and the pulse width modulator are electrically connected with the input end of the controller, the input end of a three-phase bridge type inverter circuit is electrically connected with the output end of the controller, and the output end of the three-phase bridge type inverter circuit is electrically connected with the three-phase windings.
2. A dc three-phase operating brushless servo motor according to claim 1, wherein: the rotor position detector is a hall sensor.
3. A dc three-phase operating brushless servo motor according to claim 1, wherein: the three-phase bridge type inverter circuit comprises six field effect tubes and peripheral components, wherein a first field effect tube, a third field effect tube and a fifth field effect tube form an upper bridge arm of the three-phase bridge type inverter circuit, a second field effect tube, a fourth field effect tube and a sixth field effect tube form a lower bridge arm of the three-phase bridge type inverter circuit, source electrodes of the first field effect tube, the third field effect tube and the fifth field effect tube are respectively and electrically connected with drain electrodes of the second field effect tube, the fourth field effect tube and the sixth field effect tube, common contact points of the first field effect tube, the third field effect tube and the fifth field effect tube are respectively and electrically connected with the three-phase winding, control gates of the six field effect tubes are respectively and electrically connected with an output end of the controller and a positive end of a direct current power supply, drain electrodes of the first field effect tube, the third field effect tube and the fifth field effect tube, and the source electrodes of the second field effect transistor, the fourth field effect transistor and the sixth field effect transistor are respectively and electrically connected with the negative electrode end of the direct-current power supply.
4. A dc three-phase operating brushless servo motor according to claim 1, wherein: the controller is a single chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020055678.0U CN211579843U (en) | 2020-01-10 | 2020-01-10 | Brushless servo motor of direct current three-phase operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020055678.0U CN211579843U (en) | 2020-01-10 | 2020-01-10 | Brushless servo motor of direct current three-phase operation |
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| Publication Number | Publication Date |
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| CN211579843U true CN211579843U (en) | 2020-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020055678.0U Expired - Fee Related CN211579843U (en) | 2020-01-10 | 2020-01-10 | Brushless servo motor of direct current three-phase operation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113783367A (en) * | 2021-09-09 | 2021-12-10 | 芜湖德力电机有限公司 | Intelligent voice-controlled brushless direct current motor |
| CN113783392A (en) * | 2021-09-09 | 2021-12-10 | 芜湖德力电机有限公司 | Brushless direct current motor control method |
-
2020
- 2020-01-10 CN CN202020055678.0U patent/CN211579843U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113783367A (en) * | 2021-09-09 | 2021-12-10 | 芜湖德力电机有限公司 | Intelligent voice-controlled brushless direct current motor |
| CN113783392A (en) * | 2021-09-09 | 2021-12-10 | 芜湖德力电机有限公司 | Brushless direct current motor control method |
| CN113783367B (en) * | 2021-09-09 | 2024-06-14 | 芜湖德力电机有限公司 | Intelligent sound control brushless direct current motor |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200925 Termination date: 20220110 |
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| CF01 | Termination of patent right due to non-payment of annual fee |