CN116015151A - Motor system and motor control method - Google Patents
Motor system and motor control method Download PDFInfo
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- CN116015151A CN116015151A CN202111226334.7A CN202111226334A CN116015151A CN 116015151 A CN116015151 A CN 116015151A CN 202111226334 A CN202111226334 A CN 202111226334A CN 116015151 A CN116015151 A CN 116015151A
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Abstract
A motor system and a motor control method are provided, wherein the motor system comprises a driving circuit, a motor device and a control circuit. The driving circuit is used for outputting driving current according to a plurality of control signals. The motor device drives the rotor unit to rotate according to the driving current and comprises a first sensor and a second sensor for sensing the polarities of the rotor unit in different directions and generating polarity data. The control circuit is electrically connected to the driving circuit and the motor device to receive the polarity data. When the polarity data is in the first state, the control circuit is used for recording a first duration time for which the first state is sustained. When the polarity data is changed from the first state to the second state, and the second duration for which the second state is continued corresponds to the first duration, the control circuit sets the polarity data to the third state until the polarity data is changed from the third state to the fourth state. Accordingly, the motor system can accurately control the motor operation by only configuring two sensors.
Description
Technical Field
The present disclosure relates to a motor system and a motor control method for detecting a rotor position to ensure a motor to operate normally.
Background
With the development of technology, the operating frequency of various electronic devices is increased, but the increase of the operating frequency causes the internal temperature of the electronic device to be relatively increased when the electronic device is operated, so that the fan is essential for maintaining the operation of the electronic device in order to prevent the high temperature from affecting the operation of the electronic device, even damaging the electronic device.
When the fan system is in operation, the operation state is determined according to the rotor position of the motor. Although position sensors may be configured in the fan system to detect the rotor of the motor, the number of sensors may affect the volume and cost of the motor, creating a design dilemma.
Disclosure of Invention
The present disclosure relates to a motor system including a driving circuit, a motor device and a control circuit. The driving circuit comprises a plurality of bridge arm units. The bridge arm units are electrically connected to a power supply and control the on/off of the switches according to the control signals so as to output driving currents. The motor device is electrically connected to the driving circuit to drive the rotor unit to rotate according to the driving current. The motor device comprises a first sensor and a second sensor, wherein the first sensor and the second sensor are used for sensing polarities of the rotor unit in different directions so as to generate polarity data. The control circuit is electrically connected to the driving circuit and the motor device to receive the polarity data, wherein when the polarity data is in a first state, the control circuit is used for recording a first duration time for which the first state is sustained. When the polarity data is changed from the first state to the second state, and the second duration for which the second state is continued corresponds to the first duration, the control circuit sets the current state of the polarity data to the third state until the polarity data is changed from the third state to the fourth state.
In one embodiment of the present disclosure, the first sensor is configured to sense a first polarity of the rotor unit in a first direction, the second sensor is configured to sense a second polarity of the rotor unit in a second direction, and the first polarity and the second polarity are recorded as polarity data.
In one embodiment of the present disclosure, the first polarity and the second polarity recorded in the second state and the third state are the same.
In an embodiment of the disclosure, when the polarity data is in the fourth state, the control circuit is configured to record a fourth duration for which the fourth state is continuous, and the fourth state is opposite to the first polarity and the second polarity recorded in the first state.
In an embodiment of the disclosure, the control circuit is configured to determine a relative ratio of the second duration to the first duration, and set the polarity data to the third state when the relative ratio corresponds to the set ratio.
In one embodiment of the present disclosure, the set ratio is generated according to a correction error value, and the correction error value corresponds to a relative setting position of the first sensor and the second sensor.
In one embodiment of the present disclosure, the control circuit is configured to generate the control signals according to the received polarity data, and the control signals belong to a pwm signal.
In an embodiment of the disclosure, the motor device is started, and after the control circuit determines that the polarity data is in the first state, the control circuit generates the control signals according to the polarity data and transmits the control signals to the driving circuit.
In an embodiment of the disclosure, the control circuit is further configured to record a fourth duration for the fourth state, and when the polarity data is changed from the fourth state to the fifth state, and the fifth duration for the fifth state corresponds to the fourth duration, the control circuit sets the polarity data to the sixth state until the polarity data is changed from the sixth state to the first state.
In one embodiment of the present disclosure, the setting angle between the first sensor and the second sensor is at least 120 degrees.
The present disclosure also relates to a motor control method comprising the steps of: acquiring polarities of a rotor unit of the motor device in different directions through the first sensor and the second sensor to generate polarity data; recording a first duration time for the first state when the polarity data is in the first state through the control circuit; recording a length of time for which the second state is continued when the polarity data is changed from the first state to the second state until the second duration for which the second state is continued corresponds to the first duration; when the second duration length of the second state corresponds to the first duration, setting a current state of the polarity data as a third state until the polarity data is changed from the third state to a fourth state; and generating a driving current according to the polarity data to drive the motor device.
In one embodiment of the present disclosure, a method of obtaining polarities of rotor units of a motor apparatus in different directions to generate polarity data includes: sensing a first polarity of the rotor unit in a first direction through a first sensor; and sensing a second polarity of the rotor unit in a second direction through a second sensor, wherein the first polarity and the second polarity are recorded as polarity data.
In one embodiment of the present disclosure, the first polarity and the second polarity recorded in the second state and the third state are the same.
In an embodiment of the present disclosure, the motor control method further includes: when the polarity data is in the fourth state, a fourth duration is recorded for the fourth state, wherein the fourth state is opposite to the first polarity and the second polarity recorded in the first state.
In an embodiment of the present disclosure, the method of setting the current state of the polarity data to the third state further comprises: judging the relative proportion of the second duration time to the first duration time; and setting the polarity data to a third state when the relative proportion corresponds to the set proportion.
In one embodiment of the present disclosure, the set ratio is generated according to a correction error value, and the correction error value corresponds to a relative setting position of the first sensor and the second sensor.
In one embodiment of the present disclosure, a method for generating a driving current to drive a motor device according to polarity data includes: a plurality of control signals are generated according to the polarity data to control the on or off of a plurality of switches in the driving circuit, wherein the control signals belong to a pulse width modulation signal.
In one embodiment of the present disclosure, the method of generating a driving current to drive a motor device according to polarity data further comprises: judging whether the polarity data is in a first state when the motor device is started; and when the polarity data is in the first state, generating the control signals according to the polarity data.
In an embodiment of the present disclosure, the motor control method further includes: recording a fourth duration for which the fourth state persists; when the polarity data is changed from the fourth state to the fifth state and the fifth duration for which the fifth state is continued corresponds to the fourth duration, the polarity data is set to the sixth state until the polarity data is changed from the sixth state to the first state.
In one embodiment of the present disclosure, a setting angle between the first sensor and the second sensor is at least 120 degrees.
Therefore, the motor system can accurately control the motor operation by only arranging two sensors because the motor system determines the period of the second state by recording the first duration and determines the period of the third state by detecting whether the polarity of the third state changes.
Drawings
FIG. 1 is a schematic diagram of a motor system according to some embodiments of the present disclosure;
FIG. 2 is a flow chart of a motor control method according to some embodiments of the present disclosure;
FIG. 3 is a flow chart of a motor control method according to some embodiments of the present disclosure.
[ symbolic description ]
100 motor system
110 drive circuit
120 motor device
121 rotor unit
130 control circuit
B1-B3 bridge arm unit
Q1-Q6 switch
NU three-phase node
NV three-phase node
NW three-phase node
H1 first sensor
H2 second sensor
UH control signal
UL control signal
WH control signal
WL control signal
VH control signal
VL control signal
Vb power supply
Theta is set angle
S201-S207 step
S301-S307 step
Detailed Description
Various embodiments of the invention are disclosed in the accompanying drawings, and for purposes of explanation, numerous practical details are set forth in the following description. However, it should be understood that these practical details are not to be taken as limiting the invention. That is, in some embodiments of the invention, these practical details are unnecessary. Furthermore, for the purpose of simplifying the drawings, some known and conventional structures and elements are shown in the drawings in a simplified schematic manner.
Herein, when an element is referred to as being "connected" or "coupled," it can be referred to as being "electrically connected" or "electrically coupled. "connected" or "coupled" may also mean that two or more elements co-operate or interact with each other. Furthermore, although the terms "first," "second," …, etc. may be used herein to describe various elements, this term is merely intended to distinguish between elements or operations that are described in the same technical term. Unless the context clearly indicates otherwise, the terms are not specifically intended or implied to be order or cis-ient nor intended to limit the invention.
FIG. 1 is a schematic diagram of a motor system 100 according to some embodiments of the present disclosure. The motor system 100 includes a driving circuit 110, a motor device 120, and a control circuit 130. The driving circuit 110 is electrically connected to the power supply Vb, the motor device 120 and the control circuit 130, and includes a plurality of switching elements. In an embodiment, the driving circuit 110 receives a plurality of control signals UH, UL, WH, WL, VH, VL from the control circuit 130, and controls on and off of each switching element according to the control signals UH, UL, WH, WL, VH, VL, respectively, so as to output a driving current.
Specifically, the driving circuit 110 includes three arm units B1 to B3. Each bridge arm unit B1-B3 is electrically connected to different three-phase nodes NU, NV, NW, and includes six switches Q1-Q6 in total. The bridge arm units B1 to B3 control the on and off states of the six switches Q1 to Q6 according to the control signal UH, UL, WH, WL, VH, VL, respectively, so that the driving circuit 110 outputs driving current through the three-phase node. Since the operation manner of the bridge arm unit is understood by those skilled in the art, the description is omitted herein.
The motor device 120 is electrically connected to the driving circuit 110 through three-phase nodes NU, NV, NW, so as to drive the rotor unit 121 to rotate according to the driving current. In one embodiment, the motor device 120 is a three-phase motor. That is, the three stator windings of the motor apparatus 120 generate magnetic fields according to the driving current to rotate the rotor unit 121.
In some embodiments, the motor system 100 is applied to a fan system for driving the blades of a fan to rotate, but the disclosure is not limited thereto, and the disclosure can be applied to other types of devices.
In one embodiment, the rotor unit 121 is a magnet, and when the rotor unit 121 rotates, the N pole and S pole on the rotor unit 121 rotate. The control circuit 130 must grasp the rotational orientation of the rotor unit 121, and its output control signal UH, UL, WH, WL, VH, VL can precisely control the on and off of each switching element to output the driving current.
One way of controlling a three-phase motor is to provide three sensors in the motor device 120. Each of the sensors is used for detecting the polarities of the rotor unit 121 in different directions. In one embodiment, the sensors H1, H2 are Hall sensors capable of detecting the polarity of the signal facing it, for example, N is "1" and S is "0".
As shown in fig. 1, the detection result of the sensor H1 may be recorded as a digital signal, for example: when the detection direction corresponds to the S pole of the rotor unit 121, the detected digital signal is "0"; in contrast, the detection direction of the sensor H2 corresponds to the N pole of the rotor unit, so that the digital signal it detects is "1". However, since three sensors require a larger configuration space and also require a higher cost, the present disclosure only requires two sensors H1, H2, and does not require a third sensor.
The control circuit 130 is electrically connected to the driving circuit 110 and the motor device 120, and is used for adjusting the control signal UH, UL, WH, WL, VH, VL according to the position of the rotor unit 121. In one embodiment, the control signal UH, UL, WH, WL, VH, VL is a pulse width modulated signal.
Specifically, the motor device 120 includes a first sensor H1 and a second sensor H2. The first sensor H1 and the second sensor H2 are used for respectively detecting polarities of the rotor unit 121 in different directions, so as to record as a piece of polarity data. The first sensor H1 is configured to sense a first polarity of the rotor unit 121 in a first direction, and the second sensor H2 is configured to sense a second polarity of the rotor unit 121 in a second direction. The combination of the first polarity and the second polarity is recorded as polarity data. In other words, the polarities of different portions of the rotor unit 121 will be recorded by the sensors H1 and H2 at the corresponding positions.
In the present embodiment, the positions of the first sensor H1 and the second sensor H2 respectively correspond to one stator winding in the motor device 120, so the setting angle θ between the first sensor H1 and the second sensor H2 is at least 120 degrees. In other embodiments, the setting angle θ between the first sensor H1 and the second sensor H2 can be arbitrarily adjusted.
The lower table is a table for detecting the current steering position of the rotor unit 121 by using "three sensors (indicated by H1 to H3)". Wherein "0" represents an S-pole and "1" represents an N-pole. The code is the identification code which is commonly used in the industry, and the number of the code can be set and changed by the user. For convenience of explanation, the six rotational positions of the rotor unit 121 are set to six states, respectively:
in the table, each state corresponds to a set of polarity data, and also corresponds to a rotational position (or "sector") of the motor device 120. As described above, since three sensors may result in the motor device 120 being too bulky and too costly, two sensors are used in the present disclosure, and the control circuit 130 stores the following table:
| rotor state | Code | H1 | H2 |
| First state | #1 | 0 | 0 |
| Second state | #5 | 1 | 0 |
| Third state | #4 | 1 | 0 |
| Fourth state | #6 | 1 | 1 |
| Fifth state | #2 | 0 | 1 |
| Sixth state | #3 | 0 | 1 |
In the above table, the polarity combination detected by the first sensor H1 and the second sensor H2 is polarity data. For example, "0,0" is the first state and "1,1" is the fourth state. As shown in the table, when only two sensors are provided, the polarity data of the second state and the third state are the same, and the polarity data of the fifth state and the sixth state are the same, so the control circuit 130 needs to confirm which state the current belongs to by another method.
The operation of the motor system 100 is described herein with reference to the flow chart of the motor control method shown in fig. 2. In step S201, the motor device 120 receives the driving current from the driving circuit 110, and starts to operate. In step S202, the control circuit 130 receives the polarities sensed by the first sensor H1 and the second sensor H2, and records the polarities as polarity data. If the control circuit 130 determines that the polarity data is in the first state (e.g., the combination of the first polarity and the second polarity is "0, 0"), the control circuit 130 adjusts the control signal UH, UL, WH, WL, VH, VL according to the polarity data, and transmits the control signal UH, UL, WH, WL, VH, VL to the driving circuit 110.
In steps S201 and S202, the control circuit 130 starts fine tuning after determining that the rotor unit 121 is at the predetermined position (i.e. the first state) in the zeroing stage of the motor system 100, so as to ensure that the operation of the motor device 120 meets the expectations. In one embodiment, the control circuit 130 stores a plurality of operation parameters, each of which records "the on or off state of each switch at the next instant when the motor is at a specific position", so that the control circuit 130 can generate the control signal UH, UL, WH, WL, VH, VL accordingly. Accordingly, the rotation (e.g., rotational speed) of the rotor unit 121 can be ensured to meet the expectations.
In step S203, the control circuit 130 counts a first holding time for which the polarity data is maintained in the first state. As shown in fig. 1, the switches Q1 to Q6 in the driving circuit 110 are turned on or off at different times, respectively, so as to change the current flow direction at the three-phase nodes NU, NV, NW. In other words, the switches Q1 to Q6 can be controlled in six combinations (i.e. turned on and off according to the control signal UH, UL, WH, WL, VH, VL) to rotate the rotor unit 121, so that when the polarity recorded in the polarity data changes (i.e. is no longer "0, 0"), the rotor unit 121 rotates by 60 degrees.
In step S204, the control circuit 130 continuously determines whether the polarity data is changed from the first state to the second state. In step S205, if the control circuit 130 determines that the polarity data has changed to the second state, the control circuit 130 stops counting the first holding time and starts counting the second holding time for which the polarity data is maintained in the second state instead.
In step S206, the control circuit 130 determines whether the second holding time corresponds to the first holding time. In the present embodiment, since the time for which the rotor unit 121 is in each state should be uniform, the control circuit 130 determines whether the second holding time is equal to the first holding time.
In other embodiments, the control circuit 130 will determine the relative proportion of the second duration to the first duration in response to possible errors or other control demands (e.g., rotational speed adjustment). When the relative proportion corresponds to the set proportion, the judgment result conforming to step S206 is confirmed. For example: if the first holding time is 1 ms and the set ratio is 1.2, the control circuit 130 confirms that the judgment condition of step S206 is satisfied when the second holding time is 1.2 ms.
Specifically, the set ratio may be generated according to the correction error value, and the correction error value may correspond to a relative set position (e.g., coordinates or distance length) of the first sensor H1 and the second sensor H2. For example: by measuring the sensing time points of the first sensor H1 and the second sensor H2 and comparing with the ideal time point, the obtained correction error value will reflect the position deviation of the first sensor H1 or the second sensor H2. Based on the positional deviation, a relative ratio of the second duration to the first duration may be determined. In some embodiments, the set ratio may be set to a value between 0.5 and 1.5.
In step S207, when the second holding time corresponds to the first holding time (e.g., the time lengths are equal, or the relative proportions are in accordance with the set proportions), the control circuit 130 sets the polarity data from the second state to the third state. Accordingly, although the polarities (i.e., the polarity data) recorded by the first sensor H1 and the second sensor H2 are both "1,0" in the second state and the third state, the control unit 130 can still estimate whether the current position of the rotor unit 121 should be changed to the polarity of the third state by the "timing" method, and further adjust the control signal UH, UL, WH, WL, VH, VL according to the newly set third state and the operation parameter corresponding to the third state.
In other words, although the first polarity and the second polarity of the second state and the third state are both "1,0", the control circuit 130 can estimate the time of the rotor unit 121 in the second state in a "timing" manner. When it is determined that the third state is entered, the control circuit 130 monitors the polarity combination in the polarity data instead, and maintains the third state until it is determined that the polarity data is changed from the third state to the fourth state. Accordingly, even if the motor system 100 is configured with only two sensors H1, H2, the current position of the rotor unit 121 can be accurately confirmed.
Similarly, referring to the table, when the polarity data is in the fourth state, the control circuit 130 can determine the fourth, fifth and sixth states of the polarity data sequentially in a similar manner. In some embodiments, the first to third states reflect the first half of the rotation period of the rotor unit, and the fourth to fifth states correspond to the second half of the rotation period, so that the first and second polarities recorded by the fourth and first states are opposite. As shown in the previous table, the first state is "0,0", and the fourth state is "1,1".
Referring to fig. 3, in step S301, in the third state, the control circuit 130 adjusts the control signal UH, UL, WH, WL, VH, VL according to the polarity data and the corresponding operation parameters. In step S302, the control circuit 130 determines whether the polarity data is changed from the third state to the fourth state. In other words, if the control circuit 130 determines whether the first polarity or the second polarity in the polarity data has changed. If yes, in step S303, the control circuit 130 starts to count the fourth holding time for maintaining the polarity data in the fourth state, and the control circuit 130 adjusts the control signal UH, UL, WH, WL, VH, VL according to the fourth state and the corresponding operation parameters.
In step S304, the control circuit 130 determines whether the polarity data is changed from the fourth state to the fifth state. If so, the control circuit 130 stops counting the fourth holding time, which represents the end of the fourth state. In step S305, the control circuit 130 adjusts the control signal UH, UL, WH, WL, VH, VL according to the fifth state and the corresponding operation parameter, and the control circuit 130 starts to count the fifth maintaining time for maintaining the polarity data in the fifth state.
In step S306, the control circuit 130 determines whether the fifth holding time corresponds to the fourth holding time. Similar to the aforementioned step S206, the control circuit 130 may determine whether the fifth maintaining time is "equivalent" to the fourth maintaining time, or whether the relative ratio of the fifth maintaining time and the fourth maintaining time is consistent with the set ratio.
In step S307, when the fifth maintaining time corresponds to the fourth maintaining time, the control circuit 130 sets the polarity data to the sixth state until the polarity data is changed from the third state to the first state, which means that the rotor unit 121 completes one rotation period completely.
Steps S201 to S207 and steps S301 to S307 correspond to one complete rotation cycle of the motor device 120. In one embodiment, the control circuit 130 recalculates the first hold time of the first state and the fourth hold time of the fourth state in each cycle, and estimates the second state/fifth state hold time through the first hold time/the fourth hold time. In addition, in the third state and the sixth state, the control circuit 130 need not time, and only need to monitor the polarity change in the polarity data to determine whether to enter the first state/the fourth state.
In addition, in some embodiments, the first sensor H1 and the second sensor H2 are respectively disposed on any two stator windings of the motor device 120, but the disclosure is not limited thereto. In other embodiments, the first sensor H1 and the second sensor H2 may be disposed at other positions in the motor device 120 to detect the polarity of a specific portion or direction of the rotor unit 121.
The elements, method steps or technical features of the foregoing embodiments may be combined with each other, and are not limited to the text description order or the order in which the drawings are presented in the present disclosure.
While the present disclosure has been described with reference to the above embodiments, it should be understood that the invention is not limited thereto, but may be variously modified and modified by those skilled in the art without departing from the spirit and scope of the present disclosure, and the scope of the present disclosure is accordingly defined by the appended claims.
Claims (20)
1. A motor system, comprising:
the driving circuit comprises a plurality of bridge arm units, wherein the bridge arm units are electrically connected to a power supply, and the on or off of the switches is controlled according to a plurality of control signals so as to output a driving current;
the motor device is electrically connected with the driving circuit to drive a rotor unit to rotate according to the driving current, wherein the motor device comprises a first sensor and a second sensor, and the first sensor and the second sensor are used for sensing polarities of the rotor unit in different directions so as to generate polarity data;
the control circuit is electrically connected with the driving circuit and the motor device to receive the polarity data, wherein when the polarity data is in a first state, the control circuit is used for recording a first duration time which is continuous with the first state; and
when the polarity data is changed from the first state to a second state, and a second duration of time for which the second state is continuous corresponds to the first duration, the control circuit sets a current state of the polarity data to a third state until the polarity data is changed from the third state to a fourth state.
2. The motor system of claim 1, wherein the first sensor is configured to sense a first polarity of the rotor unit in a first direction, the second sensor is configured to sense a second polarity of the rotor unit in a second direction, and the first polarity and the second polarity are recorded as the polarity data.
3. The motor system of claim 2, wherein the first polarity and the second polarity recorded in the second state and the third state are the same.
4. The motor system of claim 2, wherein when the polarity data is in the fourth state, the control circuit is configured to record a fourth duration of time for which the fourth state is continuous, and the fourth state is opposite to the first polarity and the second polarity recorded in the first state.
5. The motor system of claim 1, wherein the control circuit is configured to determine a relative ratio of the second duration to the first duration, and to set the polarity data to the third state when the relative ratio corresponds to a set ratio.
6. The motor system of claim 5, wherein the set ratio is generated based on a correction error value corresponding to a relative setting position of the first sensor and the second sensor.
7. The motor system of claim 1, wherein the control circuit is configured to generate the control signals according to the received polarity data, and the control signals are a pwm signal.
8. The motor system according to claim 7, wherein the motor device is activated, and the control circuit generates the control signals according to the polarity data after determining that the polarity data is in the first state, and transmits the control signals to the driving circuit.
9. The motor system according to claim 1, wherein the control circuit is further configured to record a fourth duration of time for which the fourth state is maintained, and when the polarity data is changed from the fourth state to a fifth state, and the fifth duration of time for which the fifth state is maintained corresponds to the fourth duration of time, the control circuit sets the polarity data to a sixth state until the polarity data is changed from the sixth state to the first state.
10. The motor system of claim 1, wherein a setting angle between the first sensor and the second sensor is at least 120 degrees.
11. A motor control method, comprising:
acquiring polarities of a rotor unit of a motor device in different directions through a first sensor and a second sensor to generate polarity data;
recording a first duration time which is sustained by a first state when the polarity data is in the first state through a control circuit;
when the polarity data is changed from the first state to a second state, recording the duration of the second state until a second duration of the second state corresponds to the first duration;
when the second duration of the second state corresponds to the first duration, setting a current state of the polarity data to a third state until the polarity data is changed from the third state to a fourth state; and
generating a driving current according to the polarity data to drive the motor device.
12. The method of claim 11, wherein the method for obtaining polarities of the rotor units of the motor apparatus in different directions to generate the polarity data comprises:
sensing a first polarity of the rotor unit in a first direction by the first sensor; and
a second polarity of the rotor unit in a second direction is sensed by the second sensor, wherein the first polarity and the second polarity are recorded as the polarity data.
13. The method of claim 12, wherein the first polarity and the second polarity recorded in the second state and the third state are the same.
14. The motor control method according to claim 12, characterized by further comprising:
when the polarity data is in the fourth state, a fourth duration is recorded for the fourth state, wherein the fourth state is opposite to the first polarity and the second polarity recorded by the first state.
15. The motor control method according to claim 11, characterized in that the method of setting the current state of the polarity data to the third state further comprises:
determining a relative ratio of the second duration to the first duration; and
when the relative proportion corresponds to a set proportion, the polarity data is set to the third state.
16. The method of claim 15, wherein the set ratio is generated based on a correction error value corresponding to a relative position of the first sensor and the second sensor.
17. The method of claim 11, wherein generating the driving current according to the polarity data to drive the motor device comprises:
a plurality of control signals are generated according to the polarity data to control the on or off of a plurality of switches in a driving circuit, wherein the control signals belong to a pulse width modulation signal.
18. The method of claim 17, wherein generating the driving current according to the polarity data to drive the motor device further comprises:
judging whether the polarity data is in the first state when the motor device is started; and
when the polarity data is in the first state, the control signals are generated according to the polarity data.
19. The motor control method according to claim 11, characterized by further comprising:
recording a fourth duration for which the fourth state persists;
when the polarity data is changed from the fourth state to a fifth state, and a fifth duration of the fifth state corresponds to the fourth duration, the polarity data is set to a sixth state until the polarity data is changed from the sixth state to the first state.
20. The method of claim 11, wherein a setting angle between the first sensor and the second sensor is at least 120 degrees.
Priority Applications (1)
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|---|---|---|---|
| CN202111226334.7A CN116015151A (en) | 2021-10-21 | 2021-10-21 | Motor system and motor control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111226334.7A CN116015151A (en) | 2021-10-21 | 2021-10-21 | Motor system and motor control method |
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| CN116015151A true CN116015151A (en) | 2023-04-25 |
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2021
- 2021-10-21 CN CN202111226334.7A patent/CN116015151A/en active Pending
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