CN118381388B - Motor speed regulating system - Google Patents
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- CN118381388B CN118381388B CN202410816560.8A CN202410816560A CN118381388B CN 118381388 B CN118381388 B CN 118381388B CN 202410816560 A CN202410816560 A CN 202410816560A CN 118381388 B CN118381388 B CN 118381388B
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- 230000001105 regulatory effect Effects 0.000 title abstract description 11
- 230000033228 biological regulation Effects 0.000 claims abstract description 40
- 238000012544 monitoring process Methods 0.000 claims abstract description 34
- 238000000034 method Methods 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 59
- 238000005070 sampling Methods 0.000 claims description 27
- 230000002457 bidirectional effect Effects 0.000 claims description 14
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 abstract description 5
- 230000002159 abnormal effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000003139 buffering effect Effects 0.000 description 1
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Abstract
The invention discloses a motor speed regulating system, which relates to the field of motors, and comprises a speed regulating control module, a motor work feedback module and a motor speed regulating control module, wherein the speed regulating control module is used for processing an input PWM signal when the duty ratio of the input PWM signal is changed, so that the duty ratio of the output PWM signal is gradually changed, and controlling the motor rotation speed of the motor work feedback module to be gradually changed until the input PWM signal is matched; compared with the prior art, the invention has the beneficial effects that: according to the invention, the speed regulation control module is arranged, so that a change process exists when the rotating speed of the motor is changed through the PWM signal, and the duty ratio of the PWM signal is gradually changed in the change process, so that the enough buffer time for the adjustment of the working voltage and the current of the motor is ensured; the safety monitoring module is arranged, the working voltage and the current of the motor can be gradually changed based on the speed regulation control module, and when the abnormal power supply of the motor is found in the motor rotating speed regulation process, the speed regulation control module can be directly controlled to stop working, so that the motor is prevented from being damaged.
Description
Technical Field
The invention relates to the field of motors, in particular to a motor speed regulating system.
Background
In daily life, devices comprising motors, such as fans, drums in washing machines, fans in air conditioners, etc., are often used. For the motor, the rotating speed of the motor can be effectively changed by changing the current and the voltage on the motor.
In the prior art, when the voltage and the current of the motor are regulated, the voltage and the current are often directly changed in a short time, the buffer time is short, the service life of the motor is not facilitated, and improvement is needed.
Disclosure of Invention
The invention aims to provide a motor speed regulating system so as to solve the problems in the background art.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a motor speed regulation system comprising:
The speed regulation control module is used for processing the input PWM (PWM 1) signal when the duty ratio of the input PWM (PWM 1) signal is changed, so that the duty ratio of the output PWM (PWM 3) signal is gradually changed, and controlling the motor rotation speed of the motor work feedback module to be gradually changed until the motor rotation speed is matched with the input PWM (PWM 1) signal;
The motor work feedback module is used for rotating the motor and sampling a voltage or current signal of the motor work to obtain a sampling voltage, and feeding the sampling voltage back to the safety monitoring module; the motor work feedback module application comprises direct current motor application and alternating current motor application;
The safety monitoring module is used for judging the magnitudes of the divided sampling voltage and the reference voltage after the sampling voltage is received and divided, and controlling whether the speed regulation control module works according to the magnitude relation between the divided sampling voltage and the reference voltage;
The output end of the speed regulation control module is connected with the input end of the motor work feedback module, the output end of the motor work feedback module is connected with the input end of the safety monitoring module, and the output end of the safety monitoring module is connected with the input end of the speed regulation control module.
As still further aspects of the invention: the speed regulation control module comprises:
A voltage change unit for changing impedance voltage distribution when the duty ratio of the input PWM (PWM 1) signal is changed, and gradually changing the voltage on the capacitor in the impedance voltage distribution process until the voltage on the capacitor is matched with the impedance voltage;
An output changing unit for gradually changing the duty ratio of the output PWM (PWM 3) signal during the voltage change process on the capacitor, and stabilizing the duty ratio of the output PWM (PWM 3) signal after the voltage on the capacitor is stabilized;
The output end of the voltage change unit is connected with the input end of the output change unit, the output end of the output change unit is connected with the input end of the motor work feedback module, and the input end of the voltage change unit is connected with the output end of the safety monitoring module.
As still further aspects of the invention: the voltage change unit comprises a first switch tube, a second switch tube, a first resistor, a first potentiometer, a second resistor, a first capacitor, a third resistor and a first diode, wherein the S electrode of the first switch tube is connected with a power supply voltage, the G electrode of the first switch tube is connected with the output end of the safety monitoring module, the D electrode of the first switch tube is connected with one end of the first resistor, the D electrode of the second switch tube is connected with the S electrode of the second switch tube, one end of the first potentiometer is connected with the G electrode of the second switch tube, the G electrode of the second switch tube is connected with a PWM1 signal, the other end of the first potentiometer is connected with one end of the second resistor, one end of the first capacitor, one end of the third resistor and the input end of the output change unit, the other end of the second resistor is grounded, the other end of the first capacitor is grounded, the other end of the third resistor is connected with the positive electrode of the first diode, and the negative electrode of the first diode is grounded.
As still further aspects of the invention: the output change unit comprises a first NOT gate, a second NOT gate, a fourth resistor and a second capacitor, wherein the power end of the first NOT gate is connected with the output end of the voltage change unit, the input end of the first NOT gate is connected with one end of the fourth resistor and one end of the second capacitor, the other end of the second capacitor is grounded, the output end of the first NOT gate is connected with the other end of the fourth resistor and the input end of the second NOT gate, and the output end of the second NOT gate is connected with the input end of the motor work feedback module.
As still further aspects of the invention: the motor work feedback module in the direct current motor application includes third switch tube, first motor, the second diode, the third condenser, the fifth resistor, the power supply voltage is connected to the D utmost point of third switch tube, the output of speed governing control module is connected to the G utmost point of third switch tube, the one end of first motor is connected to the S utmost point of third switch tube, the one end of fifth resistor is connected to the other end of first motor, the one end of third condenser, the positive pole of second diode, the other end ground connection of fifth resistor, the other end ground connection of third condenser, the input of safety monitoring module is connected to the negative pole of second diode.
As still further aspects of the invention: the motor work feedback module in the alternating current motor application includes live wire, the zero line, the bidirectional thyristor, the second motor, the mutual-inductor, the third diode, the fourth condenser, the fourth diode, the first end of bidirectional thyristor is connected to the one end of live wire, the output of speed governing control module is connected to the second end of bidirectional thyristor, the one end of second motor is connected to the third end of bidirectional thyristor, the zero line is connected to the other end of second motor, the current size of flowing through the second motor is detected to the mutual-inductor, the ground connection is connected to the one end of mutual-inductor, the positive pole of third diode is connected to the other end of third diode, the one end of fourth condenser is connected to the negative pole of fourth diode, the other end ground connection of fourth condenser, the input of safety monitoring module is connected to the negative pole of fourth diode.
As still further aspects of the invention: the safety monitoring module comprises a sixth resistor, a seventh resistor and a third comparator, one end of the sixth resistor is connected with the output end of the motor work feedback module, the other end of the sixth resistor is connected with one end of the seventh resistor and the same-phase end of the third comparator, the other end of the seventh resistor is grounded, the opposite-phase end of the third comparator is connected with a reference voltage, and the output end of the third comparator is connected with the input end of the speed regulation control module.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the speed regulation control module is arranged, so that a change process exists when the rotating speed of the motor is changed through the PWM signal, and the duty ratio of the PWM signal is gradually changed in the change process, so that the enough buffer time for the adjustment of the working voltage and the current of the motor is ensured; the safety monitoring module is arranged, the working voltage and the current of the motor can be gradually changed based on the speed regulation control module, and when the abnormal power supply of the motor is found in the motor rotating speed regulation process, the speed regulation control module can be directly controlled to stop working, so that the motor is prevented from being damaged.
Drawings
Fig. 1 is a schematic diagram of a motor speed regulation system.
Fig. 2 is a circuit diagram of the governor control module.
Fig. 3 is a circuit diagram of a motor operation feedback module in a dc motor application.
Fig. 4 is a circuit diagram of a motor operation feedback module in an ac motor application.
Fig. 5 is a circuit diagram of the safety monitoring module.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present invention are included in the protection scope of the present invention.
Referring to fig. 1, a motor speed regulation system includes:
the speed regulation control module 1 is used for processing the input PWM (PWM 1) signal when the duty ratio of the input PWM (PWM 1) signal is changed, so that the duty ratio of the output PWM (PWM 3) signal is gradually changed, and controlling the motor rotation speed of the motor work feedback module 2 to be gradually changed until the input PWM (PWM 1) signal is matched;
The motor work feedback module 2 is used for motor rotation work, sampling voltage or current signals of motor work, obtaining sampling voltage and feeding the sampling voltage back to the safety monitoring module 3; the motor work feedback module 2 application comprises direct current motor application and alternating current motor application;
the safety monitoring module 3 is used for judging the magnitudes of the divided sampling voltage and the reference voltage VREF after the sampling voltage is received and divided, and controlling whether the speed regulation control module 1 works according to the magnitude relation between the divided sampling voltage and the reference voltage VREF;
The output end of the speed regulation control module 1 is connected with the input end of the motor work feedback module 2, the output end (common point A) of the motor work feedback module 2 is connected with the input end of the safety monitoring module 3, and the output end (common point B) of the safety monitoring module 3 is connected with the input end of the speed regulation control module 1.
In this embodiment: referring to fig. 2, the speed regulation control module 1 includes:
A voltage change unit for changing impedance voltage distribution when the duty ratio of the input PWM (PWM 1) signal is changed, and gradually changing the voltage on the capacitor in the impedance voltage distribution process until the voltage on the capacitor is matched with the impedance voltage;
An output changing unit for gradually changing the duty ratio of the output PWM (PWM 3) signal during the voltage change process on the capacitor, and stabilizing the duty ratio of the output PWM (PWM 3) signal after the voltage on the capacitor is stabilized;
The output end of the voltage change unit is connected with the input end of the output change unit, the output end of the output change unit is connected with the input end of the motor work feedback module 2, and the input end of the voltage change unit is connected with the output end of the safety monitoring module 3.
In this embodiment: referring to fig. 2, the voltage variation unit includes a first switch tube V1, a second switch tube V2, a first resistor R1, a first potentiometer RP1, a second resistor R2, a first capacitor C1, a third resistor R3, and a first diode D1, wherein an S-pole of the first switch tube V1 is connected to the supply voltage VCC, a G-pole of the first switch tube V1 is connected to an output end of the safety monitoring module 3, a D-pole of the first switch tube V1 is connected to one end of the first resistor R1, a D-pole of the second switch tube V2, another end of the first resistor R1 is connected to an S-pole of the second switch tube V2, one end of the first potentiometer RP1 is connected to a PWM1 signal, another end of the first resistor R1 is connected to one end of the first capacitor C1, one end of the third resistor R3 is connected to an input end of the output changing unit, another end of the second resistor R2 is grounded, another end of the first capacitor C1 is grounded, and another end of the third resistor R3 is connected to the positive electrode of the first diode D1.
When the PWM1 signal is not input, the second switching tube V2 (NMOS) is cut off, the voltage on the first capacitor C1 is fixed at the moment (the voltage of the first capacitor C1 can be gradually increased until the voltage is stable when the power is just supplied), and the output changing unit outputs a PWM3 signal with a fixed duty ratio;
When the PWM1 signal is input, the second switching tube V2 is turned on, at which time the impedance voltage distribution is changed, and the voltage across the second resistor R2 should be increased, so that the voltage across the first capacitor C1 is gradually increased based on the presence of the first capacitor C1 until it corresponds to the theoretical voltage across the second resistor R2; gradually increasing the duty ratio of the PWM3 signal output by the output changing unit until the voltage on the first capacitor C1 stabilizes;
When the duty ratio of the PWM signal increases or decreases, the on state of the second switching tube V2 changes, and impedance voltage distribution is performed again, at which time the voltage across the second resistor R2 changes, and the voltage across the first capacitor C1 correspondingly changes (charges or discharges) until it corresponds to the theoretical voltage across the second resistor R2, so that the duty ratio of the PWM3 signal output by the output changing unit gradually changes until the voltage across the first capacitor C1 stabilizes.
In another embodiment: the third resistor R3 and the first diode D1 may be omitted, and the first diode D1 serves as a light emitting tube indicating whether the current voltage varying unit operates.
In this embodiment: referring to fig. 2, the output changing unit includes a first not gate U1, a second not gate U2, a fourth resistor R4, and a second capacitor C2, where a power end of the first not gate U1 is connected to an output end of the voltage changing unit, an input end of the first not gate U1 is connected to one end of the fourth resistor R4, one end of the second capacitor C2, another end of the second capacitor C2 is grounded, an output end of the first not gate U1 is connected to another end of the fourth resistor R4, an input end of the second not gate U2, and an output end of the second not gate U2 is connected to an input end of the motor operation feedback module 2.
When the PWM1 signal is not input, the voltage of the power end of the first NOT gate U1 is stable, no voltage exists on the second capacitor C2 at the beginning, the input end of the first NOT gate U1 is at a low level, the output end of the first NOT gate U1 outputs a high level, the second capacitor C2 is charged through the fourth resistor R4, the second capacitor C2 becomes at a high level along with the progress of charging, the input end of the first NOT gate U1 is at a high level, the output end of the first NOT gate U1 is at a low level, the second capacitor C2 generates power through the fourth resistor R4 and becomes at a low level again, the output end of the first NOT gate U1 is reciprocally changed into a PWM2 signal, and the PWM3 signal is output after passing through the second NOT gate U2 to control the motor work feedback module 2 to work;
When the PWM1 signal is input, since the voltage on the first capacitor C1 gradually increases (the power supply of the first not gate U1) until the voltage is the same as the theoretical voltage on the second resistor R2, the voltage at the output end of the first not gate U1 when outputting the high level changes, resulting in a decrease in the time (high level) for charging the second capacitor C2, while the discharge time (low level) of the second capacitor C2 is unchanged, so that the duty ratio of the formed PWM2 signal decreases, and the duty ratio of the formed PWM3 signal increases through the second not gate U2;
During PWM1 signal conditioning (here, for example, the PWM1 signal duty cycle decreases, the duty cycle increases and the PWM1 signal is inputted similarly), the second resistor R2 processes the voltage decrease, the first capacitor C1 discharges, and gradually decreases the voltage until the same as the theoretical voltage of the second resistor R2, so that the voltage at the output end of the first not gate U1 at the high level changes, resulting in an increase in the time (high level) for charging the second capacitor C2, while the discharging time (low level) of the second capacitor C2 is unchanged, so that the PWM2 signal duty cycle formed increases, and the PWM3 signal duty cycle formed decreases through the second not gate U2.
Therefore, the duty ratio of the PWM1 signal is changed gradually to change the duty ratio of the PWM3 signal, and the rotating speed of the motor in the motor work feedback module 2 is regulated, so that buffering exists in the changing process, abrupt change of the rotating speed is avoided, and the service life of the motor is reduced.
In another embodiment: other devices may be used herein to obtain PWM3 signals with gradually changing duty cycles.
In this embodiment: referring to fig. 3, in the application of the dc motor, the motor operation feedback module 2 includes a third switch tube V3, a first motor M1, a second diode D2, a third capacitor C3, and a fifth resistor R5, wherein the D pole of the third switch tube V3 is connected to the power supply voltage VCC, the G pole of the third switch tube V3 is connected to the output end of the speed regulation control module 1, the S pole of the third switch tube V3 is connected to one end of the first motor M1, the other end of the first motor M1 is connected to one end of the fifth resistor R5, one end of the third capacitor C3, the positive pole of the second diode D2, the other end of the fifth resistor R5 is grounded, and the other end of the third capacitor C3 is grounded, and the negative pole of the second diode D2 is connected to the input end of the safety monitoring module 3.
When the duty ratio of the PWM1 signal is changed in the dc motor, the duty ratio of the PWM3 signal is gradually changed, the conducting frequency of the third switching tube V3 (NMOS) is gradually changed until the third switching tube V3 is matched with the PWM1 signal, at this time, the current flowing through the first motor M1 is gradually increased or decreased, the voltage on the fifth resistor R5 is used as the sampling voltage through the second diode D2, and the sampling voltage reflects the working state of the first motor M1 and is fed back to the safety monitoring module 3.
In another embodiment, the third switching tube V3 may be replaced by other types of switching tubes, such as IGBT tubes, transistors, etc.
In this embodiment: referring to fig. 4, a motor operation feedback module 2 in an ac motor application includes a live wire L, a zero line N, a bidirectional thyristor Z1, a second motor M2, a transformer X, a third diode D3, a fourth capacitor C4, and a fourth diode D4, wherein one end of the live wire L is connected to a first end of the bidirectional thyristor Z1, a second end of the bidirectional thyristor Z1 is connected to an output end of the speed regulation control module 1, a third end of the bidirectional thyristor Z1 is connected to one end of the second motor M2, the other end of the second motor M2 is connected to the zero line N, the transformer X detects a current flowing through the second motor M2, one end of the transformer X is grounded, the other end of the transformer X is connected to an anode of the third diode D3, a cathode of the third diode D3 is connected to one end of the fourth capacitor C4, an anode of the fourth diode D4 is grounded, and the other end of the fourth capacitor C4 is grounded, and a cathode of the fourth diode D4 is connected to an input end of the safety monitoring module 3.
When the duty ratio of the PWM1 signal is changed in the alternating current motor, the duty ratio of the PWM3 signal is gradually changed, the conduction frequency of the bidirectional thyristor Z1 is gradually changed until the bidirectional thyristor Z is matched with the PWM1 signal, at the moment, the current flowing through the second motor M2 is gradually increased or reduced, the transformer X detects the current flowing through the second motor M2, a stable voltage signal is formed after passing through the third diode D3 and the fourth capacitor C4, and finally the stable voltage signal is fed back to the safety monitoring module 3 through the fourth diode D4 as sampling voltage.
In another embodiment: the control mode of gradually changing the motor speed can also be applied to a three-phase motor.
In this embodiment: referring to fig. 5, the safety monitoring module 3 includes a sixth resistor R6, a seventh resistor R7, and a third comparator U3, one end of the sixth resistor R6 is connected to the output end of the motor operation feedback module 2, the other end of the sixth resistor R6 is connected to one end of the seventh resistor R7 and the same-phase end of the third comparator U3, the other end of the seventh resistor R7 is grounded, the inverting end of the third comparator U3 is connected to the reference voltage VREF, and the output end of the third comparator U3 is connected to the input end of the speed regulation control module 1.
Under the abnormal condition of the power supply source, when the rotating speed of the first motor M1 or the second motor M2 is regulated normally, the voltage and the current on the first motor M1 or the second motor M2 are caused to be larger, in the traditional technical scheme, the first motor M1 or the second motor M2 is disconnected after the regulation based on the overlarge feedback voltage and the overlarge current, and the voltage and the current can be gradually increased or reduced based on the scheme, so that when the voltage and the current on the first motor M1 or the second motor M2 just reach the threshold value, the in-phase end voltage of the third comparator U3 is higher than the opposite-phase end voltage, the third comparator U3 outputs a high level, the first switching tube V1 (PMOS) is controlled to be cut off, and the circuit is protected.
In another embodiment: the voltage of the speed regulation control module 1 is selectively turned off, the output of the PWM3 signal is stopped, and then the first motor M1 or the second motor M2 is controlled to stop working, or the working voltage of the first motor M1 or the second motor M2 may be directly turned off.
The working principle of the invention is as follows: the speed regulation control module 1 is used for processing the input PWM (PWM 1) signal when the duty ratio of the input PWM (PWM 1) signal is changed, so that the duty ratio of the output PWM (PWM 3) signal is gradually changed, and the motor rotation speed of the motor work feedback module 2 is controlled to be gradually changed until the input PWM (PWM 1) signal is matched; the motor work feedback module 2 is used for motor rotation work, sampling voltage or current signals of motor work, obtaining sampling voltage and feeding the sampling voltage back to the safety monitoring module 3; the motor work feedback module 2 application comprises direct current motor application and alternating current motor application; the safety monitoring module 3 is configured to determine the magnitudes of the divided sampling voltage and the reference voltage VREF after the sampling voltage is divided, and control whether the speed regulation control module 1 works according to the magnitude relation between the divided sampling voltage and the reference voltage VREF.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the embodiments are to be considered in all respects as illustrative and not restrictive.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (4)
1. The utility model provides a motor speed governing system which characterized in that, this motor speed governing system includes:
The speed regulation control module is used for processing the input PWM1 signal when the duty ratio of the input PWM1 signal is changed, so that the duty ratio of the output PWM3 signal is gradually changed, and controlling the motor rotation speed of the motor work feedback module to be gradually changed until the input PWM1 signal is matched;
The motor work feedback module is used for rotating the motor and sampling a voltage or current signal of the motor work to obtain a sampling voltage, and feeding the sampling voltage back to the safety monitoring module; the motor work feedback module application comprises direct current motor application and alternating current motor application;
The safety monitoring module is used for judging the magnitudes of the divided sampling voltage and the reference voltage after the sampling voltage is received and divided, and controlling whether the speed regulation control module works according to the magnitude relation between the divided sampling voltage and the reference voltage;
the output end of the speed regulation control module is connected with the input end of the motor work feedback module, the output end of the motor work feedback module is connected with the input end of the safety monitoring module, and the output end of the safety monitoring module is connected with the input end of the speed regulation control module;
the speed regulation control module comprises:
the voltage change unit is used for changing impedance voltage distribution when the duty ratio of the input PWM1 signal is changed, and gradually changing the voltage on the capacitor in the impedance voltage distribution process until the voltage on the capacitor is matched with the impedance voltage;
The output changing unit is used for gradually changing the duty ratio of the output PWM3 signal in the voltage change process of the capacitor, and stabilizing the duty ratio of the output PWM3 signal after the voltage of the capacitor is stabilized;
The output end of the voltage change unit is connected with the input end of the output change unit, the output end of the output change unit is connected with the input end of the motor work feedback module, and the input end of the voltage change unit is connected with the output end of the safety monitoring module;
The voltage change unit comprises a first switch tube, a second switch tube, a first resistor, a first potentiometer, a second resistor, a first capacitor, a third resistor and a first diode, wherein the S electrode of the first switch tube is connected with a power supply voltage, the G electrode of the first switch tube is connected with the output end of the safety monitoring module, the D electrode of the first switch tube is connected with one end of the first resistor and the D electrode of the second switch tube, the other end of the first resistor is connected with the S electrode of the second switch tube and one end of the first potentiometer, the G electrode of the second switch tube is connected with a PWM1 signal, the other end of the first potentiometer is connected with one end of the second resistor, one end of the first capacitor, one end of the third resistor and the input end of the output change unit, the other end of the second resistor is grounded, the other end of the first capacitor is grounded, the other end of the third resistor is connected with the positive electrode of the first diode, and the negative electrode of the first diode is grounded;
The output change unit comprises a first NOT gate, a second NOT gate, a fourth resistor and a second capacitor, wherein the power end of the first NOT gate is connected with the output end of the voltage change unit, the input end of the first NOT gate is connected with one end of the fourth resistor and one end of the second capacitor, the other end of the second capacitor is grounded, the output end of the first NOT gate is connected with the other end of the fourth resistor and the input end of the second NOT gate, and the output end of the second NOT gate is connected with the input end of the motor work feedback module.
2. The motor speed regulation system of claim 1, wherein the motor operation feedback module in the dc motor application includes a third switching tube, a first motor, a second diode, a third capacitor, and a fifth resistor, the D pole of the third switching tube is connected to the power supply voltage, the G pole of the third switching tube is connected to the output end of the speed regulation control module, the S pole of the third switching tube is connected to one end of the first motor, the other end of the first motor is connected to one end of the fifth resistor, one end of the third capacitor, the positive pole of the second diode, the other end of the fifth resistor is grounded, the other end of the third capacitor is grounded, and the negative pole of the second diode is connected to the input end of the safety monitoring module.
3. The motor speed regulation system of claim 1, wherein the motor operation feedback module in the ac motor application comprises a live wire, a zero line, a bidirectional thyristor, a second motor, a transformer, a third diode, a fourth capacitor, and a fourth diode, wherein one end of the live wire is connected with the first end of the bidirectional thyristor, the second end of the bidirectional thyristor is connected with the output end of the speed regulation control module, the third end of the bidirectional thyristor is connected with one end of the second motor, the other end of the second motor is connected with the zero line, the transformer detects the current flowing through the second motor, one end of the transformer is grounded, the other end of the transformer is connected with the positive electrode of the third diode, the negative electrode of the third diode is connected with one end of the fourth capacitor, the positive electrode of the fourth diode is grounded, and the negative electrode of the fourth diode is connected with the input end of the safety monitoring module.
4. A motor speed regulation system according to any one of claims 1 to 3, wherein the safety monitoring module comprises a sixth resistor, a seventh resistor and a third comparator, one end of the sixth resistor is connected to the output end of the motor operation feedback module, the other end of the sixth resistor is connected to one end of the seventh resistor and the same-phase end of the third comparator, the other end of the seventh resistor is grounded, the opposite-phase end of the third comparator is connected to a reference voltage, and the output end of the third comparator is connected to the input end of the speed regulation control module.
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| CN118091486A (en) * | 2024-04-18 | 2024-05-28 | 山东云开电力有限公司 | Power switch cabinet state monitoring system |
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| US7414371B1 (en) * | 2005-11-21 | 2008-08-19 | Microsemi Corporation | Voltage regulation loop with variable gain control for inverter circuit |
| CN106208828B (en) * | 2015-05-27 | 2020-09-29 | 罗姆股份有限公司 | Motor drive device, motor drive IC, and cooling device and electronic apparatus using the same |
| KR102483595B1 (en) * | 2020-09-01 | 2023-01-03 | 주식회사 세바 | Pulse Width Modulated output motor control device applied to actuators |
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2024
- 2024-06-24 CN CN202410816560.8A patent/CN118381388B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116088625A (en) * | 2023-04-07 | 2023-05-09 | 河北极太科技有限公司 | Output voltage regulating circuit |
| CN118091486A (en) * | 2024-04-18 | 2024-05-28 | 山东云开电力有限公司 | Power switch cabinet state monitoring system |
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| CN118381388A (en) | 2024-07-23 |
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