CN113014148B - Speed-regulating and speed-reducing motor driving device and driving method - Google Patents
Speed-regulating and speed-reducing motor driving device and driving method Download PDFInfo
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- CN113014148B CN113014148B CN202110201628.8A CN202110201628A CN113014148B CN 113014148 B CN113014148 B CN 113014148B CN 202110201628 A CN202110201628 A CN 202110201628A CN 113014148 B CN113014148 B CN 113014148B
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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
- H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
- H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter
- H02P3/18—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor
- H02P3/24—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter for stopping or slowing an ac motor by applying dc to the motor
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Abstract
The invention discloses a driving device and a driving method for a speed-regulating and speed-reducing motor, wherein the driving device comprises: a motor coil; the motor starting and stopping control speed regulating circuit is connected with the motor coil and is used for controlling the starting and stopping of the motor coil; and the charge-discharge brake circuit is connected with the motor coil and is used for providing direct current for the motor coil so as to completely stop the motor coil. The speed-regulating and speed-reducing motor driving device is suitable for speed-regulating type speed-reducing motors with speed rings, and can realize motor starting. In addition, the parking command of the single chip microcomputer can be responded in time through the charging and discharging brake circuit, the brake response of the motor coil is controlled within 1/16 circle, the brake efficiency is high, and the conditions of reverse rotation and unfixed brake response time can be avoided.
Description
Technical Field
The invention relates to the technical field of motor driving, in particular to a speed-regulating and speed-reducing motor driving device and a driving method implemented by the speed-regulating and speed-reducing motor driving device.
Background
The speed-regulating and speed-reducing motor driver is generally in analog control, and automatic intelligent control cannot be realized.
The existing speed-regulating and speed-reducing motor adopts a relay switching circuit or a reverse driving mode to brake, wherein the phenomenon of long brake response time (namely more than 1/4 turn) can occur. In addition, the relays are prone to electric shock oxidation damage caused by ignition or large current, so that the service life of the relays is affected, and if the relays are normally used, the relays need to be regularly checked and replaced, and the use and maintenance costs are high. In addition, there are cases where the reverse rotation and the braking response time are not fixed.
Disclosure of Invention
The present invention has been made in view of the above problems, and an object of the present invention is to provide a speed-adjustable and speed-reducing motor driving device.
In view of the above problems, it is an object of the present invention to provide a driving method implemented by the speed-adjustable and speed-reducing motor driving device.
The technical scheme adopted by the invention for realizing the purpose is as follows:
a speed-governing, speed-reducing motor drive comprising:
a motor coil;
the motor starting and stopping control speed regulating circuit is connected with the motor coil and is used for controlling the starting and stopping of the motor coil;
and the charge and discharge brake circuit is connected with the motor coil and is used for providing direct current for the motor coil so as to completely stop the motor coil.
Preferably, the motor start-stop control speed regulation circuit comprises:
the control element is connected with the motor coil and is used for controlling the motor coil to rotate;
a speed feedback element connected with the motor coil and used for generating speed feedback alternating current signals MOT _ sp1 and MOT _ sp2;
the first control module is connected with the control element and used for generating an analog control signal SWITCH _ T5 and controlling the on-off of the triode Q3;
the first signal generation module is connected with the control element in parallel, is connected in series in an alternating current input power supply, and is used for generating a triangular wave signal SING with a fixed frequency of 100 Hz;
the second signal generation module is connected with the 4 th pin of the speed feedback element and used for generating a first speed regulation signal IC1_6;
the second control module is connected with the second signal generation module and is used for amplifying the first speed regulation and control signal IC1_6 into a second speed regulation and control signal IC1_3;
and the third control module is connected with the second control module and the first signal generation module, and is used for comparing a second speed regulation signal IC1_3 with the triangular WAVE signal SING and generating a timing pulse signal WAVE to control the conduction of the control element.
Preferably, the first control module includes:
the input end of the optocoupler U2 is connected with the output end of the singlechip and is used for isolating a control motor start-stop control signal MCU _ RUN sent by the singlechip;
and a base electrode of the triode Q6 is connected with the output end of the optocoupler U2, an emitting electrode of the triode Q6 is connected with an emitting electrode of the triode Q3, and a collecting electrode of the triode Q6 is connected with the base electrode of the triode Q3 and is used for controlling the motor start-stop control signal MCU _ RUN after reverse phase isolation and generating an analog control signal SWITCH _ T5, and the analog control signal SWITCH _ T5 controls the on-off of the triode Q3.
Preferably, the first signal generating module includes:
and the bridge rectifier D1 is connected with the control element in parallel, is connected with the motor coil in series in the alternating current input power supply, is connected with the third control module, and drives the triode Q1 to be switched on and off after a voltage signal at the input end of the bridge rectifier D1 is chopped by a voltage stabilizing diode ZD1 and isolated by an optocoupler U1 to generate the triangular wave signal SING.
Preferably, the second signal generating module includes:
and the digital pulse speed regulation signal processing unit is connected with a 4 th pin of the speed feedback element and is used for receiving a speed regulation square wave signal MCU _ PWM sent by the singlechip and generating a speed control voltage signal Q4_1.
Preferably, the digital pulse speed regulation signal processing unit includes:
the triode Q8 is used for receiving the speed regulation square wave signal MCU _ PWM sent by the singlechip through inverse processing;
the optocoupler U3 is used for isolating a speed regulation square wave signal MCU _ PWM sent by the single chip microcomputer after reverse phase processing;
and the operational amplifier IC3 is used for integrating, amplifying and processing the isolated speed regulation square wave signal MCU _ PWM and generating the speed control voltage signal Q4_1, and the speed control voltage signal Q4_1 and a fourth pin output signal of the bridge stack D4 jointly generate the first speed regulation and control signal IC1_6.
The base electrode of the triode Q8 is connected with the output end of the single chip microcomputer, the collector electrode of the triode Q8 is connected with the input end of the optocoupler U3, and the output end of the operational amplifier IC3 is connected with the same-direction input end of the operational amplifier.
Preferably, the second control module includes an operational amplifier IC1-1, configured to amplify the first speed regulation signal IC1_6 to generate the second speed regulation signal IC1_3;
the third control module comprises an operational amplifier IC1, and is used for comparing the second speed regulation signal IC1_3 with the triangular WAVE signal SING to generate the timing pulse signal WAVE.
Preferably, the charge and discharge brake circuit includes:
an energy storage capacitor bank;
the charging module is connected with the energy storage capacitor bank and used for charging the energy storage capacitor bank;
the discharging module is connected with the energy storage capacitor bank and used for discharging the electric quantity stored in the energy storage capacitor bank to the motor coil;
preferably, the charging module further includes a voltage stabilizing unit, and the voltage stabilizing unit includes a resistor R61 and a resistor R62 connected in parallel with the energy storage capacitor bank, a voltage reference chip U7 connected between the resistor R61 and the resistor R62, and an optocoupler U6 connected with an output end of the voltage reference chip U7.
A method of driving a speed-adjustable and speed-reducing motor, comprising:
the first control module generates an analog control signal SWITCH _ T5 to control the on-off of the triode Q3 so as to conduct the control element;
the first signal generation module generates a triangular wave signal SING with 100Hz fixed frequency;
the second signal generation module generates a first speed regulation signal IC1_6;
the second control module amplifies and processes the first speed regulation and control signal IC1_6 into a second speed regulation and control signal IC1_3;
the third control module compares a second speed regulation signal IC1_3 with the triangular WAVE signal SING to generate a timing pulse signal WAVE, and controls the control element to be conducted to enable the motor coil to rotate;
the charge-discharge brake circuit provides direct current discharge for the motor coil, so that the motor is stopped under resistance.
The invention has the beneficial effects that: the invention discloses a driving device and a driving method of a speed-regulating and speed-reducing motor, wherein the driving device comprises: a motor coil; the motor starting and stopping control speed regulating circuit is connected with the motor coil and is used for controlling the starting and stopping of the motor coil; and the charge and discharge brake circuit is connected with the motor coil and is used for providing direct current for the motor coil so as to completely stop the motor coil. The speed-regulating and speed-reducing motor driving device is suitable for speed-regulating type speed-reducing motors with speed rings, and can realize motor starting. In addition, the parking command of the single chip microcomputer can be responded in time through the charging and discharging brake circuit, the brake response of the motor coil is controlled within 1/16 circle, the brake efficiency is high, and the conditions of reverse rotation and unfixed brake response time can be avoided.
The invention is further described with reference to the following figures and examples.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a schematic circuit diagram of a speed-regulating and speed-reducing motor driving device provided by an embodiment of the invention;
FIG. 2 is a schematic circuit diagram of a motor start-stop control speed regulation circuit according to an embodiment of the present invention;
FIG. 3 is a schematic circuit diagram of a charging/discharging braking circuit according to an embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a first control module provided by an embodiment of the invention;
FIG. 5 is a schematic circuit diagram of a digital pulse rate signal processing unit according to an embodiment of the present invention;
fig. 6 is a circuit schematic diagram of a speed feedback processing circuit according to an embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the description of the present invention, it should be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.
It is noted that, in connection with the accompanying drawings,
MCU _5V means that the positive pole of the power supply of the digital signal is 5V;
MCU _ GND means that the negative pole of a digital signal power supply is 0V;
MCU _ PWM means a single-chip microcomputer speed regulation square wave signal;
IC1_8 means the anode of the analog end signal;
SGND means negative pole of analog end signal;
AC _ N means AC input N;
AC _ L means AC input L;
MCU _ STOP means a single-chip microcomputer TTL signal and controls charging and discharging enabling;
meaning I is a charging current signal;
12v _acnmeans the positive electrode of the charging module;
v means a charging switch tube driving voltage signal;
MOT _ sp1 means that one end of an alternating current signal is fed back by the running speed of a motor;
MOT _ sp2 means that the running speed of the motor feeds back the other end of the alternating current signal;
MCU _ SPED means that the motor running speed feeds back a pulse signal after analog-digital processing;
the meaning of MCU _ SPED _ PWM is a pulse signal after the motor running speed feedback filtering processing;
SW means the reference voltage at which the motor speed feedback signal modulates the operating speed.
Referring to fig. 1 to 6, in an alternative embodiment, the speed-regulating and speed-reducing motor driving device includes:
a motor coil;
the motor starting and stopping control speed regulating circuit is connected with the motor coil and is used for controlling the starting and stopping of the motor coil;
and the charge-discharge brake circuit is connected with the motor coil and is used for providing direct current for the motor coil so as to completely stop the motor coil.
When the motor is changed from a power-on state to a standby state, the motor starting signal is in a stop condition (MCU _ RUN is high level, SWITCH _ T5 is low level, the thyristor T5 driving signal is AC _ L, then the motor is not started); further, MCU _ STOP is high, discharge is prohibited, and charging is started (automatic STOP when charging reaches a set value).
When the motor is changed from a standby state to a starting and speed regulating state, the MCU _ RUN is at a low level, the triode Q6 is cut off, when the timing pulse signal WAVE is triggered at the low level, the triode Q2 is conducted, so that the triode Q3 is conducted, the driving signal of the controlled silicon T5 is SGND, the driving signal shows a potential smaller than AC _ L, the controlled silicon T5 is conducted, and the motor rotates; in addition, the rotating speed of the motor can be realized by directly setting the duty ratio of a speed regulation square wave signal MCU _ PWM of the singlechip so as to change the value of a speed control voltage signal Q4_1.
When the motor is changed from a starting state and a speed regulating state to a stopping state and a braking state, a stopping signal is triggered (MCU _ RUN is high level, SWITCH _ T5 is low level, a thyristor T5 driving signal is AC _ L, and the motor driving enables to be closed), but at the moment, the closing periodicity of the motor is delayed, and the motor cannot immediately stop rotating due to inertia energy; in addition, the MCU _ STOP is low level, the charging is forbidden, the discharging is started, the discharging tube 19 is conducted, the discharging loop is conducted, so that the electric quantity in the storage capacitor bank flows through the motor in a direct current mode, the motor is stopped, and the braking function is realized.
Referring to fig. 1 to 6, in another alternative embodiment of the speed-regulating and speed-reducing motor driving device, the motor start-stop control speed-regulating circuit includes:
the control element is connected with the motor coil and is used for controlling the motor coil to rotate;
a speed feedback element connected with the motor coil and used for generating speed feedback alternating current signals MOT _ sp1 and MOT _ sp2;
the first control module is connected with the control element and used for generating an analog control signal SWITCH _ T5 and controlling the on-off of the triode Q3;
the first signal generation module is connected with the control element in parallel, is connected in series in an alternating current input power supply, and is used for generating a triangular wave signal SING with a fixed frequency of 100 Hz;
the second signal generation module is connected with the 4 th pin of the speed feedback element and is used for generating a first speed regulation and control signal IC1_6;
the second control module is connected with the second signal generation module and is used for amplifying the first speed regulation and control signal IC1_6 into a second speed regulation and control signal IC1_3;
and the third control module is connected with the second control module and the first signal generation module, and is configured to compare a second speed regulation signal IC1_3 with the triangular WAVE signal SING and generate a timing pulse signal WAVE, so as to control the conduction of the control element.
Referring to fig. 1 to 6, in another alternative embodiment, the speed-regulating and speed-reducing motor driving device includes:
the input end of the optocoupler U2 is connected with the output end of the singlechip and is used for isolating a control motor start-stop control signal MCU _ RUN sent by the singlechip;
and a base electrode of the triode Q6 is connected with the output end of the optocoupler U2, an emitting electrode of the triode Q6 is connected with an emitting electrode of the triode Q3, and a collecting electrode of the triode Q6 is connected with the base electrode of the triode Q3, so that the triode Q6 is used for controlling the motor start-stop control signal MCU _ RUN after reverse phase isolation and generating an analog control signal SWITCH _ T5, and the analog control signal SWITCH _ T5 controls the on-off of the triode Q3.
Referring to fig. 1 to 6, in another alternative embodiment of the speed-regulating and speed-reducing motor driving device, the first signal generating module includes:
and the bridge rectifier D1 is connected with the control element in parallel and is connected with the motor coil in series in the alternating current input power supply, the bridge rectifier D1 is connected with the third control module, and a voltage signal at the input end of the bridge rectifier D1 is chopped by the voltage stabilizing diode ZD1 and isolated by the optocoupler U1 to drive the triode Q1 to be switched on and off and generate the triangular wave signal SING.
Referring to fig. 1 to 6, in another alternative embodiment of the speed-regulating and speed-reducing motor driving device, the second signal generating module includes:
and the digital pulse speed regulation signal processing unit is connected with a 4 th pin of the speed feedback element and is used for receiving a speed regulation square wave signal MCU _ PWM sent by the singlechip and generating a speed control voltage signal Q4_1.
Referring to fig. 1 to 6, in another alternative embodiment of the variable speed and deceleration motor driving device, the digital pulse variable speed signal processing unit includes:
the triode Q8 is used for receiving the speed regulation square wave signal MCU _ PWM sent by the singlechip through inverse processing;
the optocoupler U3 is used for isolating the speed regulation square wave signal MCU _ PWM sent by the singlechip after the reverse phase processing;
and the operational amplifier IC3 is used for integrating, amplifying and processing the isolated speed regulation square wave signal MCU _ PWM and generating the speed control voltage signal Q4_1, and the speed control voltage signal Q4_1 and a fourth pin output signal of the bridge stack D4 jointly generate the first speed regulation and control signal IC1_6.
The base electrode of the triode Q8 is connected with the output end of the single chip microcomputer, the collector electrode of the triode Q8 is connected with the input end of the optocoupler U3, and the output end of the operational amplifier IC3 is connected with the homodromous input end of the operational amplifier.
Referring to fig. 1 to 6, in another alternative embodiment of the speed-regulating and speed-reducing motor driving device, the second control module includes an operational amplifier IC1-1, configured to amplify the first speed regulation signal IC1_6 to generate the second speed regulation signal IC1_3;
the third control module comprises an operational amplifier IC1, and is used for comparing the second speed regulation signal IC1_3 with the triangular WAVE signal SING to generate the timing pulse signal WAVE.
The voltage amplitude of the second speed regulation signal IC1_3 directly affects the occurrence time of the timing pulse signal WAVE, so as to directly control the time for turning on the thyristor T5, i.e., realize the regulation of the motor speed.
Referring to fig. 1 to 6, in another alternative embodiment of the speed-adjustable and speed-reducing motor driving device, the charging and discharging braking circuit includes:
an energy storage capacitor bank;
the charging module is connected with the energy storage capacitor bank and used for charging the energy storage capacitor bank;
the discharging module is connected with the energy storage capacitor bank and used for discharging the electric quantity stored in the energy storage capacitor bank to the motor coil;
the on/off time sequence of the charging tube Q13 and the discharging tube Q9 is controlled by controlling the high/low level of the single-chip TTL signal MCU _ STOP (charging and discharging brake circuit allows charging in standby and running states, and the direct current discharging brake function is started at the moment of stopping, and at the moment, charging is forbidden).
In addition, the loop of the charging module sequentially comprises an alternating current input AC _ N, energy storage capacitor groups C20-C28, a protection resistor R60, a diode D11, a charging tube Q13 and an alternating current input AC _ L. And when the TTL signal MCU _ STOP of the control singlechip is in a high level, charging is started, and discharging is prohibited.
The loop of the discharging module is formed by sequentially connecting the positive electrodes of the energy storage capacitor groups C20-C28, a motor (the 1 pin, the 2 pin and the 3 pin of the JP1 socket are connected with a motor main coil), a discharging tube Q9 and the negative electrodes of the energy storage capacitor groups C20-C28; and when the TTL signal MCU _ STOP of the control singlechip is at a low level, the charging is forbidden and the discharging is started.
Referring to fig. 1 to 6, in another alternative embodiment of the speed-regulating and speed-reducing motor driving device, the charging module further includes a voltage stabilizing unit, and the voltage stabilizing unit includes a resistor R61 and a resistor R62 connected in parallel with the energy storage capacitor bank, a voltage reference chip U7 connected between the resistor R61 and the resistor R62, and an optocoupler U6 connected to an output end of the voltage reference chip U7.
The model number of the voltage reference chip is (TL 431). The voltage stabilizing unit can stabilize the voltage of the energy storage capacitor bank in a set range, prevent the device from being damaged by overcharging, and according to the electromagnetic induction, the Lorentz magnetic principle and the motor structure, when the instantaneous direct current discharges, the motor can be stopped immediately by great resistance.
Referring to fig. 1 to 6, the speed-regulating and speed-reducing motor driving device in an alternative embodiment further includes a speed feedback processing circuit, which is configured to receive speed feedback ac signals MOT _ sp1 and MOT _ sp2 (the 4-pin and 5-pin of the JP1 socket are connected to the motor speed feedback coil), and generate a pulse signal MCU _ speed _ PWM (frequency and motor speed are in a linear relationship) with a certain frequency and corresponding to the motor speed, and the pulse signal MCU _ speed _ PWM is fed back to the single chip microcomputer for display control processing.
Wherein, speed feedback circuit includes:
the optocoupler U4 is used for chopping and isolating speed feedback alternating current signals MOT _ sp1 and MOT _ sp2;
the operational amplifier IC2 is used for converting the speed feedback alternating current signals MOT _ sp1 and MOT _ sp2 into digital signals;
and the triode Q7 is used for carrying out inverse filtering processing on the converted digital signal.
The input end of the optocoupler U4 is connected with a motor speed feedback coil connected with a pin 4 and a pin 5 of the JP1 socket, the output end of the optocoupler U4 is connected with the equidirectional input end of the operational amplifier IC2, and the reverse input end of the operational amplifier IC2 is connected with the collector of the triode Q7.
A method of driving a speed-regulated and reduction motor, comprising:
the first control module generates an analog control signal SWITCH _ T5 to control the on-off of the triode Q3, so that the control element is conducted;
the first signal generation module generates a triangular wave signal SING with 100Hz fixed frequency;
the second signal generation module generates a first speed regulation signal IC1_6;
the second control module amplifies and processes the first speed regulation and control signal IC1_6 into a second speed regulation and control signal IC1_3;
the third control module compares a second speed regulation signal IC1_3 with the triangular WAVE signal SING to generate a timing pulse signal WAVE, and controls the control element to be conducted to enable the motor coil to rotate;
the charge-discharge brake circuit provides direct current discharge for the motor coil, so that the motor is stopped under resistance.
The invention discloses a driving device and a driving method for a speed-regulating and speed-reducing motor, wherein the driving device comprises: a motor coil; the motor starting and stopping control speed regulating circuit is connected with the motor coil and is used for controlling the starting and stopping of the motor coil; and the charge and discharge brake circuit is connected with the motor coil and is used for providing direct current for the motor coil so as to completely stop the motor coil. The speed-regulating and speed-reducing motor driving device is suitable for speed-regulating type speed-reducing motors with speed rings, and can realize motor starting. In addition, the parking command of the single chip microcomputer can be responded in time through the charging and discharging brake circuit, the brake response of the motor coil is controlled within 1/16 circle, the brake efficiency is high, and the conditions of reverse rotation and unfixed brake response time can be avoided.
It should be understood that, in various embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
It should also be understood that, in the embodiment of the present invention, the term "and/or" is only one kind of association relationship describing an association object, and indicates that three kinds of relationships may exist. For example, a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Those of ordinary skill in the art will appreciate that the various illustrative components and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the components and steps of the various examples have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may also be an electrical, mechanical or other form of connection.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The foregoing is merely a preferred embodiment of the invention and is not intended to limit the invention in any manner. Those skilled in the art can make numerous possible variations and modifications to the present teachings, or modify equivalent embodiments to equivalent variations, without departing from the scope of the present teachings, using the methods and techniques disclosed above. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention without departing from the technical scheme of the present invention shall be covered by the protection scope of the present invention.
Claims (9)
1. A speed-regulating and-reducing motor drive device, comprising:
a motor coil;
the motor starting and stopping control speed regulating circuit is connected with the motor coil and is used for controlling the starting and stopping of the motor coil;
the charging and discharging brake circuit is connected with the motor coil and used for providing direct current for the motor coil so as to completely stop the motor coil;
the motor start-stop control speed regulation circuit comprises a control element, a speed feedback element, a first control module, a first signal generation module, a second control module and a third control module; the control element is connected with the motor coil and is used for controlling the motor coil to rotate; the speed feedback element is connected with the motor coil and used for generating speed feedback alternating current signals MOT _ sp1 and MOT _ sp2; the first control module is connected with the control element and used for generating an analog control signal SWITCH _ T5 and controlling the on-off of the triode Q3; the first signal generation module is connected with the control element in parallel, is connected in series in an alternating current input power supply and is used for generating a triangular wave signal SING with 100Hz fixed frequency; the second signal generation module is connected with a 4 th pin of the speed feedback element and used for generating a first speed regulation signal IC1_6; the second control module is connected with the second signal generation module and is used for amplifying the first speed regulation and control signal IC1_6 into a second speed regulation and control signal IC1_3; and the third control module is connected with the second control module and the first signal generation module, and is configured to compare a second speed regulation signal IC1_3 with the triangular WAVE signal SING and generate a timing pulse signal WAVE, so as to control the conduction of the control element.
2. A speed-regulating and speed-reducing motor driving device according to claim 1, wherein said first control module comprises:
the input end of the optocoupler U2 is connected with the output end of the singlechip and is used for isolating a control motor start-stop control signal MCU _ RUN sent by the singlechip;
and a base electrode of the triode Q6 is connected with the output end of the optocoupler U2, an emitting electrode of the triode Q6 is connected with an emitting electrode of the triode Q3, and a collecting electrode of the triode Q6 is connected with the base electrode of the triode Q3 and is used for controlling the motor start-stop control signal MCU _ RUN after reverse phase isolation and generating an analog control signal SWITCH _ T5, and the analog control signal SWITCH _ T5 controls the on-off of the triode Q3.
3. The apparatus of claim 2, wherein the first signal generating module comprises:
and the bridge rectifier D1 is connected with the control element in parallel and is connected with the motor coil in series in the alternating current input power supply, the bridge rectifier D1 is connected with the third control module, and a voltage signal at the input end of the bridge rectifier D1 is chopped by the voltage stabilizing diode ZD1 and isolated by the optocoupler U1 to drive the triode Q1 to be switched on and off and generate the triangular wave signal SING.
4. A speed-regulating and-reducing motor driving device according to claim 3, wherein said second signal generating module comprises:
and the digital pulse speed regulation signal processing unit is connected with a 4 th pin of the speed feedback element and is used for receiving a speed regulation square wave signal MCU _ PWM sent by the singlechip and generating a speed control voltage signal Q4_1.
5. The speed-regulating and speed-reducing motor driving device according to claim 4, wherein the digital pulse speed-regulating signal processing unit comprises:
the triode Q8 is used for receiving a speed regulation square wave signal MCU _ PWM sent by the singlechip through reverse phase processing;
the optocoupler U3 is used for isolating the speed regulation square wave signal MCU _ PWM sent by the singlechip after the reverse phase processing;
the operational amplifier IC3 is used for integrating, amplifying and processing the isolated speed regulation square wave signal MCU _ PWM and generating the speed control voltage signal Q4_1, and the speed control voltage signal Q4_1 and a fourth pin output signal of the bridge stack D4 jointly generate the first speed regulation and control signal IC1_6;
the base electrode of the triode Q8 is connected with the output end of the single chip microcomputer, the collector electrode of the triode Q8 is connected with the input end of the optocoupler U3, and the output end of the optocoupler U3 is connected with the homodromous input end of the operational amplifier IC 3.
6. A speed-regulating and speed-reducing motor driving device according to claim 3,
the second control module comprises an operational amplifier IC1-1 which is used for amplifying the first speed regulation signal IC1_6 to generate a second speed regulation signal IC1_3;
the third control module comprises an operational amplifier IC1, and is used for comparing the second speed regulation signal IC1_3 with the triangular WAVE signal SING to generate the timing pulse signal WAVE.
7. A speed-regulating and speed-reducing motor driving device according to claim 1, wherein said charge-discharge braking circuit comprises:
an energy storage capacitor bank;
the charging module is connected with the energy storage capacitor bank and used for charging the energy storage capacitor bank;
and the discharging module is connected with the energy storage capacitor bank and used for discharging the electric quantity stored by the energy storage capacitor bank to the motor coil.
8. A speed-regulating and speed-reducing motor driving device according to claim 7, wherein said charging module further comprises a voltage-stabilizing unit, said voltage-stabilizing unit comprises a resistor R61 and a resistor R62 connected in parallel with said energy-storage capacitor bank, a voltage reference chip U7 connected between said resistor R61 and said resistor R62, and an optical coupler U6 connected to an output end of said voltage reference chip U7.
9. A driving method implemented by the apparatus for driving a speed-adjustable and speed-reducing motor according to claim 1, comprising:
the first control module generates an analog control signal SWITCH _ T5 to control the on-off of the triode Q3 so as to conduct the control element;
the first signal generation module generates a triangular wave signal SING with 100Hz fixed frequency;
the second signal generation module generates a first speed regulation signal IC1_6;
the second control module amplifies and processes the first speed regulation and control signal IC1_6 into a second speed regulation and control signal IC1_3;
the third control module compares a second speed regulation signal IC1_3 with the triangular WAVE signal SING to generate a timing pulse signal WAVE, and controls the control element to be conducted to enable the motor coil to rotate;
the charge-discharge brake circuit provides direct current discharge for the motor coil, so that the motor is stopped under resistance.
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| CN1700582A (en) * | 2004-05-21 | 2005-11-23 | 张志华 | Capacitor discharge type three-phase and single-phase servo motor electrical braking method and apparatus |
| JP5408893B2 (en) * | 2008-03-27 | 2014-02-05 | セミコンダクター・コンポーネンツ・インダストリーズ・リミテッド・ライアビリティ・カンパニー | Motor drive circuit |
| CN101997477A (en) * | 2009-08-17 | 2011-03-30 | 樱花卫厨（中国）股份有限公司 | PWM pulse regulating circuit for motor of range hood |
| CN102647146B (en) * | 2012-05-15 | 2015-01-28 | 厦门精研自动化元件有限公司 | Digital controller of single-phase alternating current motor |
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