CN114465532B - Motor controller - Google Patents
Motor controller Download PDFInfo
- Publication number
- CN114465532B CN114465532B CN202011230831.XA CN202011230831A CN114465532B CN 114465532 B CN114465532 B CN 114465532B CN 202011230831 A CN202011230831 A CN 202011230831A CN 114465532 B CN114465532 B CN 114465532B
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- Prior art keywords
- input terminal
- hall
- voltage
- motor controller
- coupled
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Classifications
-
- 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
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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
- H02P6/18—Circuit arrangements for detecting position without separate position detecting elements
-
- 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
- H02P2203/00—Indexing scheme relating to controlling arrangements characterised by the means for detecting the position of the rotor
- H02P2203/03—Determination of the rotor position, e.g. initial rotor position, during standstill or low speed operation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
A motor controller has a driving circuit, a selecting circuit, a sensorless control circuit, a Hall signal control circuit, a detecting circuit, a first input terminal and a second input terminal. The hall signal control circuit may be coupled to a hall sensor via the first input terminal and the second input terminal. When the voltage of the first input terminal and the voltage of the second input terminal are both at a low level, the motor controller operates in a sensorless driving mode. When one of the voltage of the first input terminal and the voltage of the second input terminal is at a high level, the motor controller operates in a Hall control driving mode.
Description
Technical Field
The present invention relates to a motor controller, and more particularly, to a motor controller capable of selecting a sensorless driving mode or a hall control driving mode by automatically detecting the presence or absence of a hall sensor.
Background
Conventionally, the driving method of a motor can be divided into two types. One is to switch the phase by a hall sensor to drive the motor. The other is to drive the motor to operate without a hall sensor. Fig. 1 is a schematic diagram of a conventional motor controller 10. The motor controller 10 has a driving circuit 100, a selecting circuit 110, a sensorless control circuit 120, and a hall signal control circuit 130. The driving circuit 100 generates an output signal OUT to drive a motor M. The selection circuit 110 determines to drive the motor M by the sensorless control circuit 120 or the hall signal control circuit 130 according to a MODE selection signal MODE. However, this conventional method requires an additional pin and is inconvenient to use.
Disclosure of Invention
In view of the foregoing, it is an object of the present invention to provide a motor controller capable of selecting a sensorless driving mode or a hall control driving mode by automatically detecting whether a hall sensor is present. The motor controller does not need to add an extra pin, thereby reducing the cost of the motor controller.
The motor controller is provided according to the present invention. The motor controller is used for driving a motor. The motor controller has a driving circuit, a selecting circuit, a sensorless control circuit, a Hall signal control circuit, a detecting circuit, a first input terminal and a second input terminal. The driving circuit generates an output signal to drive the motor. The sensorless control circuit receives the output signal, and is configured to sense a phase of the output signal and generate a sensorless control signal to the selection circuit to switch the phase. The first input terminal is coupled to the Hall signal control circuit and the detection circuit. The second input terminal is coupled to the Hall signal control circuit and the detection circuit. In addition, the hall signal control circuit may be coupled to a hall sensor via the first input terminal and the second input terminal. The detection circuit may also be coupled to the hall sensor via the first input terminal and the second input terminal. The Hall sensor can be used for sensing the magnetic field change when the motor rotates to generate a first Hall signal and a second Hall signal so as to switch the phase. The Hall signal control circuit can receive the first Hall signal and the second Hall signal through the first input terminal and the second input terminal, and is used for generating a Hall control signal to the selection circuit. The detection circuit generates a selection signal to the selection circuit by detecting the voltage of the first input terminal IN1 and the voltage of the second input terminal IN2. The selection circuit generates a driving signal to the driving circuit according to the selection signal, so as to determine whether the motor controller operates in a sensorless driving mode or a Hall control driving mode.
The motor controller can be applied to a single-phase motor or a multi-phase motor. The motor controller operates in a sensorless drive mode when the hall sensor is not coupled to the motor controller. The motor controller operates in a hall control drive mode when the hall sensor is coupled to the motor controller via the first input terminal and the second input terminal.
Drawings
Fig. 1 is a schematic diagram of a conventional motor controller.
Fig. 2 is a schematic diagram of a motor controller according to an embodiment of the invention.
Fig. 3A is a schematic diagram of a hall sensor according to a first embodiment of the present invention.
Fig. 3B is a schematic diagram of a hall sensor according to a second embodiment of the present invention.
Fig. 3C is a schematic diagram of a hall sensor according to a third embodiment of the present invention.
Fig. 4 is a schematic diagram of a detecting circuit according to a fourth embodiment of the invention.
Fig. 5 is a schematic diagram of a detection circuit according to a fifth embodiment of the invention.
Reference numerals illustrate: 10-a motor controller; 100-a driving circuit; 110-a selection circuit; 120-sensorless control circuit; 130-a hall signal control circuit; 140-hall sensor; MODE-MODE select signal; 20-a motor controller; IN 1-a first endpoint; IN 2-a second endpoint; 200-a driving circuit; 210-a selection circuit; 220-sensorless control circuit; 230-a hall signal control circuit; 240-hall sensor; 250-a detection circuit; vh1—a first hall signal; vh 2-a second hall signal; SLC-sensorless control signal; HAC-hall control signal; SEL-select signal; DRV-drive signal; an OUT-output signal; an M-motor; VCC-voltage source; GND-ground potential; 241-hall element; r1-a first resistor; r2-a second resistor; r3-a third resistor; r4-fourth resistor; RL 1-a first load resistance; RL 2-a second load resistance; vc 1-a first control signal; vc 2-a second control signal; 251-a first comparator; 252-a second comparator; 253-nor gate; vr reference voltage; CS 1-a first current source; CS 2-second current source.
Detailed Description
The objects, features, and advantages of the present invention will become more apparent from the following description. Preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.
Fig. 2 is a schematic diagram of a motor controller 20 according to an embodiment of the invention. The motor controller 20 is used for driving a motor M. The motor controller 20 has a driving circuit 200, a selecting circuit 210, a sensorless control circuit 220, a hall signal control circuit 230, a detecting circuit 250, a first input terminal IN1 and a second input terminal IN2. The driving circuit 200 generates an output signal OUT to drive the motor M. The sensorless control circuit 220 receives the output signal OUT, and is configured to sense the phase of the output signal OUT and generate a sensorless control signal SLC to the selection circuit 210 to switch the phase. The first input terminal IN1 is coupled to the hall signal control circuit 230 and the detection circuit 250. The second input terminal IN2 is coupled to the hall signal control circuit 230 and the detection circuit 250. IN addition, the hall signal control circuit 230 may be coupled to a hall sensor 240 via a first input terminal IN1 and a second input terminal IN2. The detection circuit 250 may also be coupled to the hall sensor 240 via a first input terminal IN1 and a second input terminal IN2. The hall sensor 240 is configured to sense a magnetic field change when the motor M rotates to generate a first hall signal Vh1 and a second hall signal Vh2 for phase switching. The hall signal control circuit 230 receives the first hall signal Vh1 and the second hall signal Vh2 via the first input terminal IN1 and the second input terminal IN2, and generates a hall control signal HAC to the selection circuit 210. The detection circuit 250 generates a selection signal SEL to the selection circuit 210 by detecting the voltage of the first input terminal IN1 and the voltage of the second input terminal IN2. The selection circuit 210 generates a driving signal DRV to the driving circuit 200 according to the selection signal SEL for determining whether the motor controller 20 is operating in the sensorless driving mode or the hall control driving mode.
There are at least three hall sensors 240 to which the present invention is applicable. Fig. 3A is a schematic diagram of a hall sensor 240 according to a first embodiment of the present invention. The hall sensor 240 may have a first resistor R1 and a hall element 241 for generating a first hall signal Vh1 and a second hall signal Vh2. The first resistor R1 is coupled to the hall element 241 and a voltage source VCC. One end of the hall element 241 is coupled to a ground potential GND. Fig. 3B is a schematic diagram of a hall sensor 240 according to a second embodiment of the present invention. The hall sensor 240 may have a second resistor R2 and a hall element 241 for generating a first hall signal Vh1 and a second hall signal Vh2. One end of the hall element 241 is coupled to a voltage source VCC. The second resistor R2 is coupled to the hall element 241 and the ground potential GND. Fig. 3C is a schematic diagram of a hall sensor 240 according to a third embodiment of the present invention. The hall sensor 240 may have a third resistor R3, a fourth resistor R4 and a hall element 241 for generating the first hall signal Vh1 and the second hall signal Vh2. The third resistor R3 is coupled to the hall element 241 and the voltage source VCC. The fourth resistor R4 is coupled to the hall element 241 and the ground potential GND.
Specifically, the motor controller 20 can determine to operate IN the sensorless driving mode or the hall control driving mode according to the voltage of the first input terminal IN1 and the voltage of the second input terminal IN2. Fig. 4 is a schematic diagram of a detecting circuit 250 according to a fourth embodiment of the invention. The detection circuit 250 may have a first load resistor RL1, a second load resistor RL2, a first comparator 251, a second comparator 252, and a nor gate 253. The first load resistor RL1 is coupled to a positive input terminal of the first comparator 251 and the ground potential GND. The second load resistor RL2 is coupled to a positive input terminal of the second comparator 252 and the ground potential GND. The first comparator 251 receives the voltage at the first input node IN1 and a reference voltage Vr for generating a first control signal Vc1 to the nor gate 253. The second comparator 252 receives the voltage at the second input node IN2 and the reference voltage Vr, and generates a second control signal Vc2 to the nor gate 253. The reference voltage Vr is smaller than the normal operation voltage value of the hall sensor 240. The nor gate 253 receives the first control signal Vc1 and the second control signal Vc2 to generate the selection signal SEL to the selection circuit 210. Therefore, when the hall sensor 240 is not coupled to the motor controller 20, the voltage of the first input terminal IN1 is smaller than the reference voltage Vr and the voltage of the second input terminal IN2 is smaller than the reference voltage Vr, so that the selection signal SEL is at a high level. When the selection signal SEL is at a high level, the selection circuit 210 drives the motor M according to the sensorless control signal SLC, so that the motor controller 20 operates in the sensorless driving mode. Conversely, when the hall sensor 240 is coupled to the motor controller 20 via the first input terminal IN1 and the second input terminal IN2, the voltage of the first input terminal IN1 is greater than the reference voltage Vr and the voltage of the second input terminal IN2 is greater than the reference voltage Vr, so that the selection signal SEL is at a low level. When the selection signal SEL is at a low level, the selection circuit 210 drives the motor M according to the hall control signal HAC, so that the motor controller 20 operates in the hall control driving mode. IN other words, when the voltage of the first input terminal IN1 and the voltage of the second input terminal IN2 are both at the low level, the motor controller 20 operates IN the sensorless driving mode. When one of the voltage at the first input terminal IN1 and the voltage at the second input terminal IN2 is at a high level, the motor controller 20 operates IN the hall control driving mode.
Fig. 5 is a schematic diagram of a detection circuit 250 according to a fifth embodiment of the invention. The detection circuit 250 may have a first current source CS1, a second current source CS2, a first comparator 251, a second comparator 252, and a nor gate 253. The first current source CS1 is coupled to the positive input terminal of the first comparator 251 and the ground potential GND. The second current source CS2 is coupled to the positive input terminal of the second comparator 252 and the ground potential GND. The first comparator 251 receives the voltage at the first input node IN1 and the reference voltage Vr, and generates a first control signal Vc1 to the nor gate 253. The second comparator 252 receives the voltage at the second input node IN2 and the reference voltage Vr, and generates a second control signal Vc2 to the nor gate 253. The nor gate 253 receives the first control signal Vc1 and the second control signal Vc2 to generate the selection signal SEL to the selection circuit 210. Therefore, when the hall sensor 240 is not coupled to the motor controller 20, the voltage of the first input terminal IN1 is less than the reference voltage Vr and the voltage of the second input terminal IN2 is less than the reference voltage Vr, such that the selection signal SEL is at a high level. When the selection signal SEL is at a high level, the selection circuit 210 drives the motor M according to the sensorless control signal SLC, so that the motor controller 20 operates in the sensorless driving mode. Conversely, when the hall sensor 240 is coupled to the motor controller 20 via the first input terminal IN1 and the second input terminal IN2, the voltage of the first input terminal IN1 is greater than the reference voltage Vr and the voltage of the second input terminal IN2 is greater than the reference voltage Vr, so that the selection signal SEL is at a low level. When the selection signal SEL is at a low level, the selection circuit 210 drives the motor M according to the hall control signal HAC, so that the motor controller 20 operates in the hall control driving mode. IN other words, when the voltage of the first input terminal IN1 and the voltage of the second input terminal IN2 are both at the low level, the motor controller 20 operates IN the sensorless driving mode. When one of the voltage at the first input terminal IN1 and the voltage at the second input terminal IN2 is at a high level, the motor controller 20 operates IN the hall control driving mode.
The motor controller 20 according to an embodiment of the present invention may be applied to a single-phase motor or a multi-phase motor. When the hall sensor 240 is not coupled to the motor controller 20, the motor controller 20 operates in a sensorless drive mode. When the hall sensor 240 is coupled to the motor controller 20 via the first input terminal IN1 and the second input terminal IN2, the motor controller 20 operates IN the hall control driving mode. The motor controller 20 does not need to add an extra pin, so that the cost of the motor controller 20 can be reduced.
While the invention has been described by way of examples of preferred embodiments, it should be understood that: the invention is not limited to the embodiments disclosed herein. On the contrary, the present invention is intended to cover various modifications and similar arrangements apparent to those skilled in the art. Accordingly, the scope of protection is to be accorded the broadest interpretation so as to encompass all such modifications and similar arrangements.
The foregoing description is only of the preferred embodiments of the invention, and all changes and modifications that come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (6)
1. A motor controller for driving a motor, the motor controller comprising:
a first input terminal;
a second input terminal;
a driving circuit for generating an output signal to drive the motor;
a selection circuit;
a sensorless control circuit for receiving the output signal to generate a sensorless control signal to the selection circuit;
a Hall signal control circuit coupled to the first input terminal and the second input terminal for generating a Hall control signal to the selection circuit; and
the detection circuit is used for detecting a voltage of the first input terminal and a voltage of the second input terminal to generate a selection signal to the selection circuit, wherein the first input terminal is coupled to a first load resistor or a first current source, the second input terminal is coupled to a second load resistor or a second current source, the detection circuit comprises a NOR gate, a first comparator and a second comparator, the NOR gate is used for generating the selection signal, the first comparator is used for receiving the voltage of the first input terminal and a reference voltage to generate a first control signal to the NOR gate, the second comparator is used for receiving the voltage of the second input terminal and the reference voltage to generate a second control signal to the NOR gate, the reference voltage is smaller than a normal operation voltage value of a Hall sensor, and the motor controller is operated in a sensor driving mode when the voltage of the first input terminal and the voltage of the second input terminal are both in a low level.
2. The motor controller of claim 1 wherein the motor controller operates in a hall control drive mode when one of the voltage at the first input terminal and the voltage at the second input terminal is at a high level.
3. The motor controller of claim 1, wherein the motor controller operates in a hall control drive mode when the hall sensor is coupled to the motor controller via the first input terminal and the second input terminal.
4. A motor controller according to claim 3, wherein the hall sensor comprises: a Hall element coupled to a ground potential; and
a first resistor is coupled to the Hall element and a voltage source.
5. A motor controller according to claim 3, wherein the hall sensor comprises: a Hall element coupled to a voltage source; and
a second resistor coupled to the Hall element and a ground potential.
6. A motor controller according to claim 3, wherein the hall sensor comprises: a Hall element;
a third resistor coupled to the Hall element and a voltage source; and
a fourth resistor coupled to the Hall element and a ground potential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011230831.XA CN114465532B (en) | 2020-11-06 | 2020-11-06 | Motor controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011230831.XA CN114465532B (en) | 2020-11-06 | 2020-11-06 | Motor controller |
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| Publication Number | Publication Date |
|---|---|
| CN114465532A CN114465532A (en) | 2022-05-10 |
| CN114465532B true CN114465532B (en) | 2023-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011230831.XA Active CN114465532B (en) | 2020-11-06 | 2020-11-06 | Motor controller |
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| Country | Link |
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| CN (1) | CN114465532B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08168289A (en) * | 1994-12-09 | 1996-06-25 | Toshiba Ave Corp | Device for detecting rotational position of brushless motor and video tape recorder provided with it |
| TW200841578A (en) * | 2007-04-10 | 2008-10-16 | Anpec Electronics Corp | Motor driving circuit having low current consumption under a standby mode |
| WO2009095979A1 (en) * | 2008-01-28 | 2009-08-06 | Hokuto Control Corporation | Motor driving device |
| CN101807873A (en) * | 2009-02-17 | 2010-08-18 | 罗姆股份有限公司 | The drive circuit of motor, driving method and cooling device |
| CN109742984A (en) * | 2017-10-30 | 2019-05-10 | 日本电产株式会社 | Driving circuit and motor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9913355B2 (en) * | 2014-07-30 | 2018-03-06 | Semiconductor Components Industries, Llc | Method of forming a sequencing system and structure therefor |
| TWI538383B (en) * | 2015-05-22 | 2016-06-11 | 茂達電子股份有限公司 | Motor driving circuit |
-
2020
- 2020-11-06 CN CN202011230831.XA patent/CN114465532B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08168289A (en) * | 1994-12-09 | 1996-06-25 | Toshiba Ave Corp | Device for detecting rotational position of brushless motor and video tape recorder provided with it |
| TW200841578A (en) * | 2007-04-10 | 2008-10-16 | Anpec Electronics Corp | Motor driving circuit having low current consumption under a standby mode |
| WO2009095979A1 (en) * | 2008-01-28 | 2009-08-06 | Hokuto Control Corporation | Motor driving device |
| CN101807873A (en) * | 2009-02-17 | 2010-08-18 | 罗姆股份有限公司 | The drive circuit of motor, driving method and cooling device |
| CN109742984A (en) * | 2017-10-30 | 2019-05-10 | 日本电产株式会社 | Driving circuit and motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114465532A (en) | 2022-05-10 |
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