CN106972789B - Motor rotor position detection system and method thereof - Google Patents
Motor rotor position detection system and method thereof Download PDFInfo
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- CN106972789B CN106972789B CN201710326383.5A CN201710326383A CN106972789B CN 106972789 B CN106972789 B CN 106972789B CN 201710326383 A CN201710326383 A CN 201710326383A CN 106972789 B CN106972789 B CN 106972789B
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- motor
- hall
- rotor
- hall position
- position sensors
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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
- H02P6/00—Arrangements for controlling synchronous motors or other dynamo-electric motors using electronic commutation dependent on the rotor position; Electronic commutators therefor
- H02P6/14—Electronic commutators
- H02P6/16—Circuit arrangements for detecting position
Abstract
The application discloses a motor rotor position detection system, which comprises three groups of Hall position sensors, a motor control unit and a motor control unit, wherein the three groups of Hall position sensors are respectively used for detecting a clockwise starting position of a motor, a counterclockwise starting position of the motor and a normal running position of the motor; each group of Hall position sensors comprises three Hall position sensors, and each group of Hall position sensors is arranged in the motor shell; and a magnetic ring fixed to an end of the rotor shaft for simultaneously rotating with the rotor and generating a varying magnetic field signal to provide magnetic field excitation for the hall position sensor; the input end of the multiplexer is connected with the Hall position sensor, the control end of the multiplexer is respectively connected with the motor rotating speed output end and the motor rotating direction output end of the microprocessor, the microprocessor is respectively connected with the motor rotating speed sensor and the current sensor, and the motor rotating speed sensor and the current sensor are both arranged on the motor; the output end of the multiplexer is connected with a main controller, and the main controller is connected with the display module.
Description
Technical Field
The application belongs to the field of motor detection, and particularly relates to a motor rotor position detection system and a motor rotor position detection method.
Background
The motor control system is used for detecting the rotor position within the running speed range, and the basic requirements of detection accuracy, simple circuit structure, reliable operation and strong anti-interference capability are met. The common position sensor has photosensitive type, magnetic sensitive type, proximity switch and the like, the output of the position sensor is digital signals, the output signals of the position detector change correspondingly when the rotor rotates by one stepping foot, and the motor control system sends out control instructions to control the corresponding windings to be electrified or powered off.
In the prior art, a Hall position sensor is adopted to detect the position of a motor rotor, and the defects are that: the position detection resolution is not high, and quick starting of the motor in the clockwise direction and the anticlockwise direction cannot be realized.
Disclosure of Invention
In order to solve the defects in the prior art, the application provides a motor rotor position detection system which has the advantages of less IO resources occupied by a main controller, low cost and capability of realizing the quick starting of a motor in clockwise and anticlockwise directions;
the application relates to a motor rotor position detection system, which comprises:
the three groups of Hall position sensors are respectively used for detecting the clockwise starting position of the motor, the anticlockwise starting position of the motor and the normal running position of the motor; each group of Hall position sensors comprises three Hall position sensors, and each group of Hall position sensors is arranged in the motor shell; a kind of electronic device with high-pressure air-conditioning system
A magnetic ring fixed to the rotor shaft end for simultaneous rotation with the rotor and generating a varying magnetic field signal to provide magnetic field excitation for the hall position sensor; a kind of electronic device with high-pressure air-conditioning system
The input end of the multiplexer is connected with the Hall position sensor, the control end of the multiplexer is respectively connected with the motor rotating speed output end and the motor rotating direction output end of the microprocessor, the microprocessor is respectively connected with the motor rotating speed sensor and the current sensor, and the motor rotating speed sensor and the current sensor are respectively arranged on the motor and are respectively used for detecting the rotating speed and the motor rotating direction of the motor in real time; the output end of the multiplexer is connected with a main controller, and the main controller is connected with the display module.
Further, three hall position sensors of each set of hall position sensors are mounted on the motor 120 degrees apart from each other.
Further, the current sensor is a current transformer.
Furthermore, the main controller is also connected with a PC end server, and the PC end server is connected with a PC.
Further, the main controller is connected with the PC end server through an optical fiber.
Furthermore, the PC end server is also connected with the cloud end server, and the remote end server is connected with the mobile monitoring terminal.
Further, the PC end server is connected with the cloud end server through a wireless module.
The application also provides a detection method of the motor rotor position detection system. The method comprises the following steps:
three groups of Hall position sensors detect the clockwise starting position of the motor, the anticlockwise starting position of the motor and the normal running position of the motor; simultaneously, the magnetic ring and the rotor simultaneously rotate and generate a changed magnetic field signal to provide magnetic field excitation for the Hall position sensor; a kind of electronic device with high-pressure air-conditioning system
The multiplexer receives signals transmitted by the Hall position sensors, and outputs signals transmitted by the Hall position sensors of the corresponding group to the main controller according to the motor rotating speed and the motor rotating direction information received by the control terminal and displays the signals in real time.
The method further comprises the steps of: and the main controller transmits the received signals to the cloud server for storage through the PC end server.
The method further comprises the steps of: and the mobile monitoring terminal invokes corresponding signals from the cloud server and performs remote real-time monitoring.
Compared with the prior art, the application has the beneficial effects that:
(1) The signals detected by the three groups of Hall position sensors are switched through the multiplexer to control and switch, the three groups of signals can be converted through the two control ports of the multiplexer, the IO resources of the main controller are occupied rarely, and the cost is low.
(2) According to the motor rotor detection system, the three groups of Hall position sensors are arranged, so that the motor can be started quickly in the clockwise direction and the anticlockwise direction, and compared with a rotor position detection system adopting a rotary transformer as a position detection device, the motor rotor detection system is lower in cost and simpler to realize.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.
FIG. 1 is a schematic diagram of a motor rotor position detection system of the present application;
FIG. 2 is a schematic diagram of a motor rotor position detection system of the present application;
FIG. 3 is a comparison of a clockwise start-up state Hall signal timing diagram with a normal operation Hall signal timing diagram;
FIG. 4 is a comparison of a counter-clockwise start-up state Hall signal timing diagram and a normal operation Hall signal timing diagram.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the application. 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 application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
Fig. 1 is a schematic diagram of a motor rotor position detection system according to the present application.
As shown in fig. 1, a motor rotor position detection system of the present application includes:
the three groups of Hall position sensors are respectively used for detecting the clockwise starting position of the motor, the anticlockwise starting position of the motor and the normal running position of the motor; each group of Hall position sensors comprises three Hall position sensors, and each group of Hall position sensors is arranged in the motor shell; a kind of electronic device with high-pressure air-conditioning system
A magnetic ring fixed to the rotor shaft end for simultaneous rotation with the rotor and generating a varying magnetic field signal to provide magnetic field excitation for the hall position sensor; a kind of electronic device with high-pressure air-conditioning system
The input end of the multiplexer is connected with the Hall position sensor, the control end of the multiplexer is respectively connected with the motor rotating speed output end and the motor rotating direction output end of the microprocessor, the microprocessor is respectively connected with the motor rotating speed sensor and the current sensor, and the motor rotating speed sensor and the current sensor are respectively arranged on the motor and are respectively used for detecting the rotating speed and the motor rotating direction of the motor in real time; the output end of the multiplexer is connected with a main controller, and the main controller is connected with the display module.
The microprocessor can be realized by adopting a 51-chip microcomputer or an ARM-chip microcomputer.
The main controller can be realized by adopting an ARM single-chip microcomputer or an FPGA chip.
Three hall position sensors of each group of hall position sensors are mounted on the motor 120 degrees apart from each other.
The current sensor is a current transformer.
The display module is a liquid crystal screen or an LED display screen.
Specifically, the motor rotor position detection system adopts Hall position sensors, and is divided into 3 groups, wherein each group adopts 3 Hall sensors, and the total number of the Hall sensors is 9. A magnetic ring with 8 pairs of NS magnetic poles is fixed at the end part of a rotor shaft, and when the rotor rotates, the magnetic ring simultaneously rotates to generate a changed magnetic field signal so as to provide magnetic field excitation for the Hall position sensor. Two of the pieces 74HC153 are used as multiplexers for the three sets of Hall position signals. When the motor is in three states of clockwise starting, anticlockwise starting and normal running respectively, the three position signals are switched through the switching signals of the multiplexer.
As shown in fig. 2, U1 to U2 are two-way 4 input multiplexers; U3-U9 are bipolar Hall switches; c1 to C2 are chip power supply filter capacitors; p1 is the rotor position detection system output interface.
U3, U4, U5 are motor normal operation rotor position detection switches, used for providing rotor position washing when the motor is in normal operation; u6, U7, U8 are motor clockwise start rotor position detection switch, used for the motor clockwise start, provide the rotor position sub-signal; u9, U10, U11 are motor anticlockwise start rotor position detection switches for when the motor starts clockwise, provide rotor position sub-signal.
The output signals of U3-U9 are transmitted to the input pins of U1 and U2, and the switching of the output signals is carried out through two multi-channel selection signals of S1 and S2, wherein the specific switching is shown in the table.
TABLE 1 Hall position signal output selection truth table
| S0 | S1 | HALL_A | HALL_B | HALL_C | |
| 1 | 0 | 0 | A | B | C |
| 2 | 1 | 0 | A1 | B1 | C1 |
| 3 | 0 | 1 | A2 | B2 | C2 |
| 4 | 1 | 1 | × | × | × |
When s0=0 and s1=0, the signal output by the rotor position detection system is a motor normal running position detection signal; when s0=1 and s1=0, the signal output by the rotor position detection system is a motor clockwise starting position detection signal; when s0=0 and s1=1, the signal output by the rotor position detection system is a motor counterclockwise starting position detection signal; when s0=1, s1=1, the output signal is an invalid signal.
A. B, C represents the mechanical positions of the rotor position sensing switches U3, U4, U5, which are 120 degrees out of phase with each other, representing the positions of the three-phase winding stator and rotor of the switched reluctance motor.
A1, B1, C1 represent the mechanical positions of the rotor position detection switches U6, U7, U8; they are at 120 degrees mechanical angle from each other. In addition, to achieve a clockwise quick start of the motor, they are advanced by an angle clockwise from the position where the stator and rotor of the three-phase winding of the switched reluctance motor are aligned. The timing of the hall position signal for the clockwise actuation is shown in fig. 3.
A2, B2 and C2 represent the mechanical positions of rotor position detection switches U9, U10 and U11; they are at 120 degrees mechanical angle from each other. In addition, in order to achieve counter-clockwise quick start of the motor, they are advanced by an angle counter-clockwise from the aligned position of the stator and rotor of the three-phase winding of the switched reluctance motor. The timing of the hall position signal for the clockwise actuation is shown in fig. 4.
The rotor position detection switches, which are activated clockwise and counterclockwise, are advanced by an angle relative to the respective steering direction, respectively, relative to the rotor position detection switches, which are normally operated. According to the application, under the starting state of the motor, the current is injected into each phase winding more rapidly when the phase inductance is minimum, so that larger starting torque is generated, the acceleration of the motor starting is improved, and the aim of quick motor starting is fulfilled.
The signals detected by the three groups of Hall position sensors are switched through the multiplexer to control and switch, the three groups of signals can be converted through the two control ports of the multiplexer, the IO resources of the main controller are occupied rarely, and the cost is low.
According to the motor rotor detection system, the three groups of Hall position sensors are arranged, so that the motor can be started quickly in the clockwise direction and the anticlockwise direction, and compared with a rotor position detection system adopting a rotary transformer as a position detection device, the motor rotor detection system is lower in cost and simpler to realize.
In other embodiments, the main controller of the present application is further connected to a PC-side server, which is connected to a PC.
In other embodiments, the host controller is connected to the PC-side server via an optical fiber.
In other embodiments, the PC-side server is further connected to a cloud server, where the remote server is connected to the mobile monitoring terminal.
In other embodiments, the PC-side server is connected to the cloud server through a wireless module.
In other embodiments, the mobile monitoring terminal is a mobile phone or a notebook computer.
The application also provides a detection method of the motor rotor position detection system. The method comprises the following steps:
three groups of Hall position sensors detect the clockwise starting position of the motor, the anticlockwise starting position of the motor and the normal running position of the motor; simultaneously, the magnetic ring and the rotor simultaneously rotate and generate a changed magnetic field signal to provide magnetic field excitation for the Hall position sensor; a kind of electronic device with high-pressure air-conditioning system
The multiplexer receives signals transmitted by the Hall position sensors, and outputs signals transmitted by the Hall position sensors of the corresponding group to the main controller according to the motor rotating speed and the motor rotating direction information received by the control terminal and displays the signals in real time.
The method further comprises the steps of: and the main controller transmits the received signals to the cloud server for storage through the PC end server.
The method further comprises the steps of: and the mobile monitoring terminal invokes corresponding signals from the cloud server and performs remote real-time monitoring.
While the foregoing description of the embodiments of the present application has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the application, but rather, it is intended to cover all modifications or variations within the scope of the application as defined by the claims of the present application.
Claims (8)
1. A motor rotor position detection system, comprising:
the three groups of Hall position sensors are respectively used for detecting the clockwise starting position of the motor, the anticlockwise starting position of the motor and the normal running position of the motor; each group of Hall position sensors comprises three Hall position sensors, and each group of Hall position sensors is arranged in the motor shell; three hall position sensors in each group of hall position sensors are installed on the motor with 120 degrees of mutual phase difference; a kind of electronic device with high-pressure air-conditioning system
A magnetic ring fixed to the rotor shaft end for simultaneous rotation with the rotor and generating a varying magnetic field signal to provide magnetic field excitation for the hall position sensor; a kind of electronic device with high-pressure air-conditioning system
The input end of the multiplexer is connected with the Hall position sensor, the control end of the multiplexer is respectively connected with the motor rotating speed output end and the motor rotating direction output end of the microprocessor, the microprocessor is respectively connected with the motor rotating speed sensor and the current sensor, and the motor rotating speed sensor and the current sensor are respectively arranged on the motor and are respectively used for detecting the rotating speed and the motor rotating direction of the motor in real time; the current sensor is a current transformer; the output end of the multiplexer is connected with a main controller, and the main controller is connected with the display module.
2. The motor rotor position detection system of claim 1, wherein the master controller is further coupled to a PC-side server, the PC-side server being coupled to a PC.
3. The motor rotor position detection system of claim 2, wherein the master controller is connected to a PC-side server via an optical fiber.
4. The motor rotor position detection system of claim 2, wherein the PC-side server is further connected to a cloud server, and the cloud server is connected to a mobile monitoring terminal.
5. The motor rotor position detection system of claim 4, wherein the PC-side server is connected to the cloud server via a wireless module.
6. A detection method of an electric motor rotor position detection system according to any one of claims 1 to 5, comprising:
three groups of Hall position sensors detect the clockwise starting position of the motor, the anticlockwise starting position of the motor and the normal running position of the motor; simultaneously, the magnetic ring and the rotor simultaneously rotate and generate a changed magnetic field signal to provide magnetic field excitation for the Hall position sensor; a kind of electronic device with high-pressure air-conditioning system
The multiplexer receives signals transmitted by the Hall position sensors, and outputs signals transmitted by the Hall position sensors of the corresponding group to the main controller according to the motor rotating speed and the motor rotating direction information received by the control terminal and displays the signals in real time.
7. The method of detecting a rotor position of an electric machine of claim 6, further comprising:
and the main controller transmits the received signals to the cloud server for storage through the PC end server.
8. The method of detecting a rotor position of an electric machine of claim 7, further comprising: and the mobile monitoring terminal invokes corresponding signals from the cloud server and performs remote real-time monitoring.
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| CN201710326383.5A CN106972789B (en) | 2017-05-10 | 2017-05-10 | Motor rotor position detection system and method thereof |
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| CN201710326383.5A CN106972789B (en) | 2017-05-10 | 2017-05-10 | Motor rotor position detection system and method thereof |
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Effective date of registration: 20230920 Address after: No. 699 Liming South Road, Rongcheng City, Weihai City, Shandong Province, 264333 Patentee after: RONGCHENG RONGJIA POWER CO.,LTD. Address before: 250014 No. 19, ASTRI Road, Lixia District, Shandong, Ji'nan Patentee before: INSTITUTE OF AUTOMATION, SHANDONG ACADEMY OF SCIENCES |
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