CN210898983U - Safe and efficient motor drive control system - Google Patents
Safe and efficient motor drive control system Download PDFInfo
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- CN210898983U CN210898983U CN201922322107.9U CN201922322107U CN210898983U CN 210898983 U CN210898983 U CN 210898983U CN 201922322107 U CN201922322107 U CN 201922322107U CN 210898983 U CN210898983 U CN 210898983U
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Abstract
The utility model relates to a safe efficient motor drive control system, this motor drive control system includes: the system comprises a processor module, a soft start control module, an F/U conversion module, a PWM signal generation module, a driving module, a direct current motor and an under-voltage detection module, wherein the soft start control module is electrically connected with an external brake control unit; the undervoltage detection module is suitable for detecting working voltage data of the direct current motor and sending the working voltage data to the processor module, namely when the working voltage data are lower than a set value, the processor module is suitable for controlling the direct current motor to stop working through the driving module; the utility model discloses a frequency control signal to outside braking control unit handles to turn into voltage control signal and realizes the control of opening and stopping DC motor, has reduced the impulse current when DC motor starts, has realized the soft start function, in time shuts down when DC motor is in under-voltage operating condition, guarantees production safety.
Description
Technical Field
The utility model relates to a motor drive control field especially relates to a safe efficient motor drive control system.
Background
At present, more and more cities in China select electric vehicles as important components of urban public transportation, and the hydraulic braking system has the characteristics of compact structure and small equipment and is widely applied to the electric vehicles. The direct current motor is used as an indispensable component of a hydraulic braking system and provides power for a hydraulic oil pump, but a traditional motor driving control circuit cannot be directly connected with an external braking control unit, and a control unit needs to be independently provided, so that the problems of cost improvement and resource waste are caused.
And the commonly used hydraulic oil pump can have an under-voltage working state, and if the power supply of the motor is not cut off in time, the service life of the motor is shortened, the motor is damaged, and even safety accidents occur.
Therefore, it is necessary to develop a new safe and efficient motor driving control system to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a safe efficient motor drive control system to how to solve and realize that direct current motor in time shuts down when under-voltage operating condition and guarantees safe problem.
In order to solve the technical problem, the utility model provides a safe efficient motor drive control system, it includes: the system comprises a processor module, a soft start control module, an F/U conversion module, a PWM signal generation module, a driving module, a direct current motor and an under-voltage detection module, wherein the soft start control module is electrically connected with an external brake control unit; the external brake control unit is suitable for sending a frequency control signal to the soft start control module so as to convert the frequency control signal into a voltage control signal through the F/U conversion module after soft start; the PWM signal generation module is suitable for sending a PWM signal according to a voltage control signal to control the driving module to work so as to control the starting and stopping of the direct current motor; and the undervoltage detection module is suitable for detecting the working voltage data of the direct current motor and sending the working voltage data to the processor module, namely when the working voltage data is lower than a set value, the processor module is suitable for controlling the direct current motor to stop working through the driving module.
Further, the soft start control module comprises: a soft start control circuit; the soft start control circuit is adapted to control an instantaneous inrush current of the dc motor when the dc motor is adapted to be started.
Further, the F/U conversion module includes: a frequency-to-voltage conversion circuit; the frequency-voltage conversion circuit converts a high-frequency signal in a frequency control signal into a low-frequency signal through a frequency divider, and performs sequential logic operation through a logic trigger, namely converts the frequency control signal into a voltage control signal and outputs the voltage control signal to the PWM signal generation module.
Further, the PWM signal generation module includes: the triangular wave generating circuit and the voltage comparator are electrically connected with the F/U conversion module; the triangular wave generating circuit is suitable for generating a triangular wave signal to be sent to the voltage comparator, namely the voltage comparator is suitable for comparing the triangular wave signal with the voltage control signal and then generating a PWM signal to be sent to the driving module.
Further, the driving module includes: the MOS tube driving chip and the MOS tube group; the MOS tube driving chip is suitable for controlling the conduction or the cut-off of the MOS tube group according to the PWM signal so as to control the start and the stop of the direct current motor.
Further, the motor drive control system further includes: the over-current protection circuit is electrically connected with the MOS tube driving chip; when the MOS tube driving chip outputs a high-level signal, a control tube in the overcurrent protection circuit is conducted, and voltage division is carried out through a plurality of voltage division resistors.
Further, the undervoltage detection module acquires the working voltage data of the direct current motor through a detection resistor.
Further, the motor drive control system further includes: an EMC protection circuit; the EMC protection circuit is suitable for carrying out overcurrent and overvoltage surge protection on the circuit.
Further, the motor drive control system further includes: a photoelectric isolation circuit; the optoelectronic isolation circuit is adapted to optoelectronic isolate the circuit.
The beneficial effects of the utility model are that, the utility model discloses a frequency control signal to outside braking control unit handles to turn into voltage control signal and realizes opening the control of stopping to DC motor to under frequency signal control, when DC motor is opened, impact current when having reduced DC motor and having started has realized the soft start function, through under-voltage detection module real-time detection DC motor's operating condition, in time shut down when DC motor is in under-voltage operating condition, guarantee production safety.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a schematic block diagram of a safe and efficient motor drive control system of the present invention;
fig. 2 is a circuit diagram of the soft start control circuit and the frequency-voltage conversion circuit of the present invention;
fig. 3 is a circuit diagram of a PWM signal generation module of the present invention;
fig. 4 is a circuit diagram of the driving module of the present invention;
fig. 5 is a circuit diagram of the overcurrent protection circuit of the present invention.
In the figure: and a direct current motor M1.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
Example 1
Fig. 1 is a schematic block diagram of the safe and efficient motor drive control system of the present invention.
In the present embodiment, as shown in fig. 1, the present embodiment provides a safe and efficient motor drive control system, which includes: the system comprises a processor module, a soft start control module, an F/U conversion module, a PWM signal generation module, a driving module, a direct current motor M1 and an under-voltage detection module, wherein the soft start control module is electrically connected with an external brake control unit; the external brake control unit is suitable for sending a frequency control signal to the soft start control module so as to convert the frequency control signal into a voltage control signal through the F/U conversion module after soft start; the PWM signal generation module is suitable for sending a PWM signal according to a voltage control signal to control the driving module to work so as to control the starting and stopping of the direct current motor M1; and the undervoltage detection module is suitable for detecting the working voltage data of the direct current motor and sending the working voltage data to the processor module, namely when the working voltage data is lower than a set value, the processor module is suitable for controlling the direct current motor to stop working through the driving module.
In this embodiment, the processor module may be, but is not limited to, an STM32 series single chip microcomputer.
In this embodiment, the frequency control signal of the external brake control unit is processed and converted into the voltage control signal to realize the control of starting and stopping the dc motor M1, and under the control of the frequency signal, when the dc motor M1 is started, the impact current when the dc motor M1 is started is reduced, the soft start function is realized, the working state of the dc motor is detected in real time through the under-voltage detection module, the dc motor is stopped in time when the dc motor is in the under-voltage working state, and the production safety is ensured.
Fig. 2 is a circuit diagram of the soft start control circuit and the frequency-voltage conversion circuit of the present invention.
Specifically, as an optional implementation manner, as shown in fig. 2, the soft-start control module includes: a soft start control circuit; the soft-start control circuit is adapted to control the instantaneous inrush current of the dc motor M1 when the dc motor M1 is adapted to be started.
Specifically, as an alternative implementation, as shown in fig. 2, the F/U conversion module includes: a frequency-to-voltage conversion circuit; the frequency-voltage conversion circuit converts a high-frequency signal in a frequency control signal into a low-frequency signal through a frequency divider U3, and performs sequential logic operation through a logic trigger, namely, converts the frequency control signal into a voltage control signal and outputs the voltage control signal to the PWM signal generation module.
In this embodiment, as shown in fig. 2, a frequency divider U3 (in this embodiment, a CD74HCT4040MG4 frequency divider may be used, but is not limited to it) converts a 16MHz signal into a 15.625kHz signal, and drives a MOS transistor Q17 to conduct periodically, so as to provide a clock pulse CP to a logic flip-flop U5 (in this embodiment, a HEF40175BT logic flip-flop may be used, but is not limited to it); the logic trigger U5 and the logic controller U6B perform sequential logic operation on the frequency Control signal, In each Control period t1 of Control _ In, one CP period is 64 mus, at this time, U6B outputs low level, the triode Q23 is conducted, and VCC charges the capacitor C29 through the resistor R61; in the time t1-CP, the transistor Q23 is turned off, the capacitor C29 discharges through the resistor R65, namely the resistor R65 is far larger than the resistor R61, the charging is fast, the discharging is slow, so the U _ In end is a direct current voltage signal with the amplitude rising slowly and further being stable (dynamic balance).
Fig. 3 is a circuit diagram of the PWM signal generating module according to the present invention.
Specifically, as an alternative embodiment, as shown in fig. 3, the PWM signal generating module includes: a triangular wave generating circuit and a voltage comparator (in this embodiment, an LM2901DG voltage comparator may be adopted, but is not limited thereto) electrically connected to the F/U conversion module; the triangular wave generating circuit is suitable for generating a triangular wave signal to be sent to the voltage comparator, namely the voltage comparator is suitable for comparing the triangular wave signal with the voltage control signal and then generating a PWM signal to be sent to the driving module.
In this embodiment, the other components except U1A constitute a triangular wave generating circuit, and U _ In is compared with the triangular wave through U1A to generate a PWM signal.
Fig. 4 is a circuit diagram of the driving module of the present invention.
Specifically, as an alternative embodiment, as shown in fig. 4, the driving module includes: a MOS transistor driver chip (in the present embodiment, an IR2121 driver chip may be adopted, but is not limited to this), and a MOS transistor group; the MOS tube driving chip is suitable for controlling the conduction or the cutoff of the MOS tube group according to the PWM signal so as to control the start and the stop of the direct current motor M1.
In the embodiment, as shown in fig. 4, a MOS transistor TR1 and a MOS transistor TR2 are connected in parallel (to double the overcurrent capacity) to serve as an electronic switch controlled by a direct current motor; through MOS pipe driver chip drive MOS pipe TR1, MOS pipe TR2, when MOS pipe driver chip U4 output high level, MOS pipe TR1, MOS pipe TR2 switch on, and direct current motor gets electric the start. The freewheeling diode TR3, the current sense resistor FB1, and the gate resistor R4 are selected to have appropriate values to optimize switching speed and switching losses.
Fig. 5 is a circuit diagram of the overcurrent protection circuit of the present invention.
Specifically, as an alternative embodiment, as shown in fig. 5, the motor drive control system further includes: the over-current protection circuit is electrically connected with the MOS tube driving chip; when the MOS tube driving chip outputs a high-level signal, a control tube in the overcurrent protection circuit is conducted, and voltage division is carried out through a plurality of voltage division resistors.
In this embodiment, as shown In fig. 5, when the MOS transistor driving chip outputs a high level signal, the transistor Q18 is turned on, and then the transistor Q22 is turned on after voltage division by the resistor R54 and the resistor R55 and low-pass filtering by the resistor R55 and the capacitor C24, at this time, the under-voltage and over-current signals are pulled low, and the PWM _ In is turned off.
Specifically, as an optional implementation manner, the under-voltage detection module obtains the working voltage data of the dc motor through a detection resistor.
In this embodiment, the motor drive control system further includes: and the overheat detection circuit is electrically connected with the processor module, is suitable for detecting the working temperature of the direct current motor and sending the working temperature to the processor module, and when the working temperature exceeds a set value, the processor module controls the direct current motor to stop working through the driving module.
Specifically, as an optional implementation manner, the motor drive control system further includes: an EMC protection circuit; the EMC protection circuit is suitable for carrying out overcurrent and overvoltage surge protection on the circuit.
Specifically, as an optional implementation manner, the motor drive control system further includes: a photoelectric isolation circuit; the optoelectronic isolation circuit is adapted to optoelectronic isolate the circuit.
To sum up, the utility model discloses a frequency control signal to outside braking control unit handles to turn into voltage control signal and realizes the control of opening and stopping DC motor to under frequency signal control, when DC motor was opened, the impulse current when having reduced DC motor and started has realized the soft start function, through under-voltage detection module real-time detection DC motor's operating condition, in time shut down when DC motor is in under-voltage operating condition, assurance production safety.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (9)
1. A safe and efficient motor drive control system, comprising:
the system comprises a processor module, a soft start control module, an F/U conversion module, a PWM signal generation module, a driving module, a direct current motor and an under-voltage detection module, wherein the soft start control module is electrically connected with an external brake control unit; wherein
The external brake control unit is suitable for sending a frequency control signal to the soft start control module so as to convert the frequency control signal into a voltage control signal through the F/U conversion module after soft start;
the PWM signal generation module is suitable for sending a PWM signal according to a voltage control signal to control the driving module to work so as to control the starting and stopping of the direct current motor; and
the undervoltage detection module is suitable for detecting the working voltage data of the direct current motor and sending the working voltage data to the processor module, namely
And when the working voltage data is lower than a set value, the processor module is suitable for controlling the direct current motor to stop working through the driving module.
2. A safe and efficient motor drive control system as claimed in claim 1,
the soft start control module includes: a soft start control circuit;
the soft start control circuit is adapted to control an instantaneous inrush current of the dc motor when the dc motor is adapted to be started.
3. A safe and efficient motor drive control system as claimed in claim 1,
the F/U conversion module includes: a frequency-to-voltage conversion circuit;
the frequency-voltage conversion circuit converts a high-frequency signal in a frequency control signal into a low-frequency signal through a frequency divider and performs sequential logic operation through a logic trigger, namely
And converting the frequency control signal into a voltage control signal and outputting the voltage control signal to the PWM signal generation module.
4. A safe and efficient motor drive control system as claimed in claim 1,
the PWM signal generation module includes: the triangular wave generating circuit and the voltage comparator are electrically connected with the F/U conversion module;
the triangular wave generating circuit being adapted to generate a triangular wave signal for transmission to the voltage comparator, i.e.
The voltage comparator is suitable for comparing the triangular wave signal with the voltage control signal, generating a PWM signal and sending the PWM signal to the driving module.
5. A safe and efficient motor drive control system as claimed in claim 4,
the driving module includes: the MOS tube driving chip and the MOS tube group;
the MOS tube driving chip is suitable for controlling the conduction or the cut-off of the MOS tube group according to the PWM signal so as to control the start and the stop of the direct current motor.
6. A safe and efficient motor drive control system as claimed in claim 5,
the motor drive control system further includes: the over-current protection circuit is electrically connected with the MOS tube driving chip;
when the MOS tube driving chip outputs a high-level signal, a control tube in the overcurrent protection circuit is conducted, and voltage division is carried out through a plurality of voltage division resistors.
7. A safe and efficient motor drive control system as claimed in claim 1,
the undervoltage detection module acquires working voltage data of the direct current motor through a detection resistor.
8. A safe and efficient motor drive control system as claimed in claim 1,
the motor drive control system further includes: an EMC protection circuit;
the EMC protection circuit is suitable for carrying out overcurrent and overvoltage surge protection on the circuit.
9. A safe and efficient motor drive control system as claimed in claim 1,
the motor drive control system further includes: a photoelectric isolation circuit;
the optoelectronic isolation circuit is adapted to optoelectronic isolate the circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922322107.9U CN210898983U (en) | 2019-12-23 | 2019-12-23 | Safe and efficient motor drive control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922322107.9U CN210898983U (en) | 2019-12-23 | 2019-12-23 | Safe and efficient motor drive control system |
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| CN210898983U true CN210898983U (en) | 2020-06-30 |
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| CN201922322107.9U Active CN210898983U (en) | 2019-12-23 | 2019-12-23 | Safe and efficient motor drive control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112769357A (en) * | 2021-01-07 | 2021-05-07 | 上海威迈斯新能源有限公司 | Direct current motor soft start control method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112769357A (en) * | 2021-01-07 | 2021-05-07 | 上海威迈斯新能源有限公司 | Direct current motor soft start control method and system |
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